diff --git a/docs/02-configuration.md b/docs/02-configuration.md
index 7416324..691a74b 100644
--- a/docs/02-configuration.md
+++ b/docs/02-configuration.md
@@ -72,7 +72,7 @@ $api = new OpenWeatherMap('yourapikey', [
 > To get to know about all the available methods, make sure to check the documentation [here](https://github.com/programmatordev/php-api-sdk?tab=readme-ov-file#documentation).
 
 The following sections have examples of some of the most important methods, 
-particularly related with the configuration of the client, cache and logger.
+particularly related to the configuration of the client, cache and logger.
 
 ### `setClientBuilder`
 
diff --git a/docs/03-supported-apis.md b/docs/03-supported-apis.md
index 6742d70..a4de66a 100644
--- a/docs/03-supported-apis.md
+++ b/docs/03-supported-apis.md
@@ -6,6 +6,9 @@
     - [getWeatherByDate](#getweatherbydate)
     - [getWeatherSummaryByDate](#getweathersummarybydate)
     - [getWeatherOverviewByDate](#getweatheroverviewbydate)
+  - [AI Assistant](#ai-assistant)
+    - [startSession](#startsession)
+    - [resumeSession](#resumesession)
   - [Weather](#weather)
     - [getCurrent](#getcurrent)
     - [getForecast](#getforecast)
@@ -84,6 +87,36 @@ Returns a [`WeatherOverview`](05-entities.md#weatheroverview) object:
 $weatherOverview = $api->oneCall()->getWeatherOverviewByDate(50, 50, new \DateTime('today'));
 ```
 
+### AI Assistant
+
+#### `startSession`
+
+```php
+startSession(string $prompt): Answer
+```
+
+Start a new session (create a new conversation) with the Weather AI Assistant.
+
+Returns a [`Answer`](05-entities.md#answer) object:
+
+```php
+$answer = $api->assistant()->startSession('How is the weather today in Lisbon?');
+```
+
+#### `resumeSession`
+
+```php
+resumeSession(string $sessionId, string $prompt): Answer
+```
+
+Resume a session (continue a conversation) with the Weather AI Assistant.
+
+Returns a [`Answer`](05-entities.md#answer) object:
+
+```php
+$answer = $api->assistant()->resumeSession('session-id', 'Do I need an umbrella?');
+```
+
 ### Weather
 
 #### `getCurrent`
@@ -192,7 +225,7 @@ $locations = $api->geocoding()->getByLocationName('lisbon');
 getByCoordinate(float $latitude, float $longitude, int $numResults = 5): array
 ```
 
-Get name of the location (city name or area name) by using geographical coordinates (latitude, longitude). 
+Get the name of the location (city name or area name) by using geographical coordinates (latitude, longitude). 
 
 Returns an array of [`Location`](05-entities.md#location) objects.
 
@@ -261,7 +294,7 @@ withCacheTtl(?int $ttl): self
 Makes a request and saves into cache for the provided duration in seconds. 
 
 Semantics of values:
-- `0`, the response will not be cached (if the servers specifies no `max-age`).
+- `0`, the response will not be cached (if the server specifies no `max-age`).
 - `null`, the response will be cached for as long as it can (forever).
 
 > [!NOTE]
diff --git a/docs/05-entities.md b/docs/05-entities.md
index fb84b9f..20267d4 100644
--- a/docs/05-entities.md
+++ b/docs/05-entities.md
@@ -4,6 +4,7 @@
   - [Weather](#weather)
   - [WeatherMoment](#weathermoment)
   - [WeatherSummary](#weathersummary)
+  - [WeatherOverview](#weatheroverview)
   - [WeatherData](#weatherdata)
   - [MinuteData](#minutedata)
   - [HourData](#hourdata)
@@ -11,10 +12,13 @@
   - [Alert](#alert)
   - [MoonPhase](#moonphase)
   - [Temperature](#temperature)
+- [AI Assistant](#ai-assistant)
+  - [Answer](#answer)
+  - [WeatherData](#weatherdata-1)
 - [Weather](#weather-1)
   - [Weather](#weather-2)
   - [WeatherCollection](#weathercollection)
-  - [WeatherData](#weatherdata)
+  - [WeatherData](#weatherdata-2)
 - [Air Pollution](#air-pollution)
   - [AirPollution](#airpollution)
   - [AirPollutionCollection](#airpollutioncollection)
@@ -171,6 +175,33 @@
 - `getMin()`: `?float`
 - `getMax()`: `?float`
 
+## AI Assistant
+
+### Answer
+
+- `getAnswer()`: `string`
+- `getSessionId()`: `string`
+- `getData()`: [`WeatherData[]`](#weatherdata-1)
+
+### WeatherData
+
+- `getLocationName()`: `string`
+- `getDateTime()`: `\DateTimeImmutable`
+- `getTemperature()`: `float`
+- `getTemperatureFeelsLike()`: `float`
+- `getAtmosphericPressure()`: `int`
+- `getVisibility()`: `?int`
+- `getHumidity()`: `int`
+- `getDewPoint()`: `float`
+- `getUltraVioletIndex()`: `?float`
+- `getCloudiness()`: `int`
+- `getWind()`: [`Wind`](#wind)
+- `getConditions()`: [`Condition[]`](#condition)
+- `getRainVolume()`: `?float`
+- `getSnowVolume()`: `?float`
+- `getSunriseAt()`: `?\DateTimeImmutable`
+- `getSunsetAt()`: `?\DateTimeImmutable`
+
 ## Weather
 
 ### Weather
diff --git a/src/Entity/AirPollution/AirPollutionCollection.php b/src/Entity/AirPollution/AirPollutionCollection.php
index c91c222..192834a 100644
--- a/src/Entity/AirPollution/AirPollutionCollection.php
+++ b/src/Entity/AirPollution/AirPollutionCollection.php
@@ -3,12 +3,10 @@
 namespace ProgrammatorDev\OpenWeatherMap\Entity\AirPollution;
 
 use ProgrammatorDev\OpenWeatherMap\Entity\Coordinate;
-use ProgrammatorDev\OpenWeatherMap\Util\EntityTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
 
 class AirPollutionCollection
 {
-    use EntityTrait;
-
     private int $numResults;
 
     private Coordinate $coordinate;
@@ -20,7 +18,7 @@ public function __construct(array $data)
     {
         $this->numResults = count($data['list']);
         $this->coordinate = new Coordinate($data['coord']);
-        $this->data = $this->createEntityList(AirPollutionData::class, $data['list']);
+        $this->data = EntityHelper::createEntityList(AirPollutionData::class, $data['list']);
     }
 
     public function getNumResults(): int
diff --git a/src/Entity/Assistant/Answer.php b/src/Entity/Assistant/Answer.php
new file mode 100644
index 0000000..28396e7
--- /dev/null
+++ b/src/Entity/Assistant/Answer.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Entity\Assistant;
+
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
+
+class Answer
+{
+    private string $answer;
+
+    private string $sessionId;
+
+    /** @var WeatherData[] */
+    private array $data = [];
+
+    public function __construct(array $data)
+    {
+        $this->answer = $data['answer'];
+        $this->sessionId = $data['session_id'];
+
+        if (!empty($data['data'])) {
+            $this->data = EntityHelper::createEntityKeyList(WeatherData::class, $data['data']);
+        }
+    }
+
+    public function getAnswer(): string
+    {
+        return $this->answer;
+    }
+
+    public function getSessionId(): string
+    {
+        return $this->sessionId;
+    }
+
+    public function getData(): array
+    {
+        return $this->data;
+    }
+}
\ No newline at end of file
diff --git a/src/Entity/Assistant/WeatherData.php b/src/Entity/Assistant/WeatherData.php
new file mode 100644
index 0000000..cd07e37
--- /dev/null
+++ b/src/Entity/Assistant/WeatherData.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Entity\Assistant;
+
+use ProgrammatorDev\OpenWeatherMap\Entity\BaseWeather;
+
+class WeatherData extends BaseWeather
+{
+    private string $locationName;
+
+    private float $temperature;
+
+    private float $temperatureFeelsLike;
+
+    private int $visibility;
+
+    private \DateTimeImmutable $sunriseAt;
+
+    private \DateTimeImmutable $sunsetAt;
+
+    public function __construct(string $locationName, array $data)
+    {
+        parent::__construct($data);
+
+        $this->locationName = $locationName;
+        $this->temperature = $data['temp'];
+        $this->temperatureFeelsLike = $data['feels_like'];
+        $this->visibility = $data['visibility'];
+        $this->sunriseAt = \DateTimeImmutable::createFromFormat('U', $data['sunrise']);
+        $this->sunsetAt = \DateTimeImmutable::createFromFormat('U', $data['sunset']);
+    }
+
+    public function getLocationName(): string
+    {
+        return $this->locationName;
+    }
+
+    public function getTemperature(): float
+    {
+        return $this->temperature;
+    }
+
+    public function getTemperatureFeelsLike(): float
+    {
+        return $this->temperatureFeelsLike;
+    }
+
+    public function getVisibility(): int
+    {
+        return $this->visibility;
+    }
+
+    public function getSunriseAt(): \DateTimeImmutable
+    {
+        return $this->sunriseAt;
+    }
+
+    public function getSunsetAt(): \DateTimeImmutable
+    {
+        return $this->sunsetAt;
+    }
+}
\ No newline at end of file
diff --git a/src/Entity/OneCall/BaseWeather.php b/src/Entity/BaseWeather.php
similarity index 86%
rename from src/Entity/OneCall/BaseWeather.php
rename to src/Entity/BaseWeather.php
index dfa9f69..a7e897f 100644
--- a/src/Entity/OneCall/BaseWeather.php
+++ b/src/Entity/BaseWeather.php
@@ -1,15 +1,11 @@
 <?php
 
-namespace ProgrammatorDev\OpenWeatherMap\Entity\OneCall;
+namespace ProgrammatorDev\OpenWeatherMap\Entity;
 
-use ProgrammatorDev\OpenWeatherMap\Entity\Condition;
-use ProgrammatorDev\OpenWeatherMap\Entity\Wind;
-use ProgrammatorDev\OpenWeatherMap\Util\EntityTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
 
 class BaseWeather
 {
-    use EntityTrait;
-
     private \DateTimeImmutable $dateTime;
 
     private int $atmosphericPressure;
@@ -46,7 +42,7 @@ public function __construct(array $data)
             'gust' => $data['wind_gust'] ?? null
         ]);
 
-        $this->conditions = $this->createEntityList(Condition::class, $data['weather']);
+        $this->conditions = EntityHelper::createEntityList(Condition::class, $data['weather']);
         $this->rainVolume = $data['rain']['1h'] ?? $data['rain']['3h'] ?? $data['rain'] ?? null;
         $this->snowVolume = $data['snow']['1h'] ?? $data['snow']['3h'] ?? $data['snow'] ?? null;
     }
diff --git a/src/Entity/OneCall/DayData.php b/src/Entity/OneCall/DayData.php
index fd3adec..e15467b 100644
--- a/src/Entity/OneCall/DayData.php
+++ b/src/Entity/OneCall/DayData.php
@@ -2,6 +2,8 @@
 
 namespace ProgrammatorDev\OpenWeatherMap\Entity\OneCall;
 
+use ProgrammatorDev\OpenWeatherMap\Entity\BaseWeather;
+
 class DayData extends BaseWeather
 {
     private Temperature $temperature;
diff --git a/src/Entity/OneCall/HourData.php b/src/Entity/OneCall/HourData.php
index fa59ccf..5eaf765 100644
--- a/src/Entity/OneCall/HourData.php
+++ b/src/Entity/OneCall/HourData.php
@@ -2,6 +2,8 @@
 
 namespace ProgrammatorDev\OpenWeatherMap\Entity\OneCall;
 
+use ProgrammatorDev\OpenWeatherMap\Entity\BaseWeather;
+
 class HourData extends BaseWeather
 {
     private float $temperature;
diff --git a/src/Entity/OneCall/Weather.php b/src/Entity/OneCall/Weather.php
index 945c6ec..09395e1 100644
--- a/src/Entity/OneCall/Weather.php
+++ b/src/Entity/OneCall/Weather.php
@@ -4,12 +4,10 @@
 
 use ProgrammatorDev\OpenWeatherMap\Entity\Coordinate;
 use ProgrammatorDev\OpenWeatherMap\Entity\Timezone;
-use ProgrammatorDev\OpenWeatherMap\Util\EntityTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
 
 class Weather
 {
-    use EntityTrait;
-
     private Coordinate $coordinate;
 
     private Timezone $timezone;
@@ -43,14 +41,14 @@ public function __construct(array $data)
         $this->current = new WeatherData($data['current']);
 
         $this->minutelyForecast = isset($data['minutely'])
-            ? $this->createEntityList(MinuteData::class, $data['minutely'])
+            ? EntityHelper::createEntityList(MinuteData::class, $data['minutely'])
             : null;
 
-        $this->hourlyForecast = $this->createEntityList(HourData::class, $data['hourly']);
-        $this->dailyForecast = $this->createEntityList(DayData::class, $data['daily']);
+        $this->hourlyForecast = EntityHelper::createEntityList(HourData::class, $data['hourly']);
+        $this->dailyForecast = EntityHelper::createEntityList(DayData::class, $data['daily']);
 
         $this->alerts = isset($data['alerts'])
-            ? $this->createEntityList(Alert::class, $data['alerts'])
+            ? EntityHelper::createEntityList(Alert::class, $data['alerts'])
             : null;
     }
 
diff --git a/src/Entity/OneCall/WeatherData.php b/src/Entity/OneCall/WeatherData.php
index 2811290..0154344 100644
--- a/src/Entity/OneCall/WeatherData.php
+++ b/src/Entity/OneCall/WeatherData.php
@@ -2,6 +2,8 @@
 
 namespace ProgrammatorDev\OpenWeatherMap\Entity\OneCall;
 
+use ProgrammatorDev\OpenWeatherMap\Entity\BaseWeather;
+
 class WeatherData extends BaseWeather
 {
     private float $temperature;
diff --git a/src/Entity/Weather/WeatherCollection.php b/src/Entity/Weather/WeatherCollection.php
index ae7486d..dbb7f3d 100644
--- a/src/Entity/Weather/WeatherCollection.php
+++ b/src/Entity/Weather/WeatherCollection.php
@@ -3,12 +3,10 @@
 namespace ProgrammatorDev\OpenWeatherMap\Entity\Weather;
 
 use ProgrammatorDev\OpenWeatherMap\Entity\Location;
-use ProgrammatorDev\OpenWeatherMap\Util\EntityTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
 
 class WeatherCollection
 {
-    use EntityTrait;
-
     private int $numResults;
 
     private Location $location;
@@ -32,7 +30,7 @@ public function __construct(array $data)
             'timezone_offset' => $data['city']['timezone']
         ]);
 
-        $this->data = $this->createEntityList(WeatherData::class, $data['list']);
+        $this->data = EntityHelper::createEntityList(WeatherData::class, $data['list']);
     }
 
     public function getNumResults(): int
diff --git a/src/Entity/Weather/WeatherData.php b/src/Entity/Weather/WeatherData.php
index 021c22f..b44f7ed 100644
--- a/src/Entity/Weather/WeatherData.php
+++ b/src/Entity/Weather/WeatherData.php
@@ -4,12 +4,10 @@
 
 use ProgrammatorDev\OpenWeatherMap\Entity\Condition;
 use ProgrammatorDev\OpenWeatherMap\Entity\Wind;
-use ProgrammatorDev\OpenWeatherMap\Util\EntityTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
 
 class WeatherData
 {
-    use EntityTrait;
-
     private \DateTimeImmutable $dateTime;
 
     private float $temperature;
@@ -50,7 +48,7 @@ public function __construct(array $data)
         $this->cloudiness = $data['clouds']['all'];
         $this->visibility = $data['visibility'];
         $this->atmosphericPressure = $data['main']['pressure'];
-        $this->conditions = $this->createEntityList(Condition::class, $data['weather']);
+        $this->conditions = EntityHelper::createEntityList(Condition::class, $data['weather']);
         $this->wind = new Wind($data['wind']);
 
         $this->precipitationProbability = isset($data['pop'])
diff --git a/src/Helper/EntityHelper.php b/src/Helper/EntityHelper.php
new file mode 100644
index 0000000..2993ca6
--- /dev/null
+++ b/src/Helper/EntityHelper.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Helper;
+
+class EntityHelper
+{
+    public static function createEntityList(string $entityClass, array $list): array
+    {
+        return array_map(function(array $data) use ($entityClass) {
+            return new $entityClass($data);
+        }, $list);
+    }
+
+    public static function createEntityKeyList(string $entityClass, array $list): array
+    {
+        return array_map(function(array $data, int|string $key) use ($entityClass) {
+            return new $entityClass($key, $data);
+        }, $list, array_keys($list));
+    }
+}
\ No newline at end of file
diff --git a/src/Util/ReflectionTrait.php b/src/Helper/ReflectionHelper.php
similarity index 66%
rename from src/Util/ReflectionTrait.php
rename to src/Helper/ReflectionHelper.php
index 1eb92ab..fa67ce8 100644
--- a/src/Util/ReflectionTrait.php
+++ b/src/Helper/ReflectionHelper.php
@@ -1,10 +1,10 @@
 <?php
 
-namespace ProgrammatorDev\OpenWeatherMap\Util;
+namespace ProgrammatorDev\OpenWeatherMap\Helper;
 
-trait ReflectionTrait
+class ReflectionHelper
 {
-    private function getClassConstants(string $className): array
+    public static function getClassConstants(string $className): array
     {
         $class = new \ReflectionClass($className);
         $constants = $class->getConstants();
diff --git a/src/Language/Language.php b/src/Language/Language.php
index a92c795..9c914b9 100644
--- a/src/Language/Language.php
+++ b/src/Language/Language.php
@@ -2,12 +2,10 @@
 
 namespace ProgrammatorDev\OpenWeatherMap\Language;
 
-use ProgrammatorDev\OpenWeatherMap\Util\ReflectionTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\ReflectionHelper;
 
 class Language
 {
-    use ReflectionTrait;
-
     public const AFRIKAANS = 'af';
     public const ALBANIAN = 'al';
     public const ARABIC = 'ar';
@@ -57,6 +55,6 @@ class Language
 
     public static function getOptions(): array
     {
-        return (new Language)->getClassConstants(self::class);
+        return ReflectionHelper::getClassConstants(self::class);
     }
 }
\ No newline at end of file
diff --git a/src/OpenWeatherMap.php b/src/OpenWeatherMap.php
index 04b7d0f..af09872 100644
--- a/src/OpenWeatherMap.php
+++ b/src/OpenWeatherMap.php
@@ -13,6 +13,7 @@
 use ProgrammatorDev\OpenWeatherMap\Exception\UnexpectedErrorException;
 use ProgrammatorDev\OpenWeatherMap\Language\Language;
 use ProgrammatorDev\OpenWeatherMap\Resource\AirPollutionResource;
+use ProgrammatorDev\OpenWeatherMap\Resource\AssistantResource;
 use ProgrammatorDev\OpenWeatherMap\Resource\GeocodingResource;
 use ProgrammatorDev\OpenWeatherMap\Resource\OneCallResource;
 use ProgrammatorDev\OpenWeatherMap\Resource\WeatherResource;
@@ -21,12 +22,12 @@
 
 class OpenWeatherMap extends Api
 {
-    private array $options;
+    public readonly array $options;
 
     private OptionsResolver $optionsResolver;
 
     public function __construct(
-        #[\SensitiveParameter] private readonly string $apiKey,
+        #[\SensitiveParameter] public readonly string $apiKey,
         array $options = []
     )
     {
@@ -43,6 +44,11 @@ public function oneCall(): OneCallResource
         return new OneCallResource($this);
     }
 
+    public function assistant(): AssistantResource
+    {
+        return new AssistantResource($this);
+    }
+
     public function weather(): WeatherResource
     {
         return new WeatherResource($this);
diff --git a/src/Resource/AssistantResource.php b/src/Resource/AssistantResource.php
new file mode 100644
index 0000000..7d06c16
--- /dev/null
+++ b/src/Resource/AssistantResource.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Resource;
+
+use Http\Message\Authentication\Header;
+use ProgrammatorDev\Api\Method;
+use ProgrammatorDev\OpenWeatherMap\Entity\Assistant\Answer;
+use Psr\Http\Client\ClientExceptionInterface;
+
+class AssistantResource extends Resource
+{
+    /**
+     * Start a new session (create a new conversation) with the Weather AI Assistant
+     *
+     * @throws ClientExceptionInterface
+     */
+    public function startSession(string $prompt): Answer
+    {
+        $this->api->setAuthentication(new Header('X-Api-Key', $this->api->apiKey));
+
+        $data = $this->api->request(
+            method: Method::POST,
+            path: '/assistant/session',
+            body: json_encode(['prompt' => $prompt])
+        );
+
+        return new Answer($data);
+    }
+
+    /**
+     * Resume a session (continue a conversation) with the Weather AI Assistant
+     *
+     * @throws ClientExceptionInterface
+     */
+    public function resumeSession(string $sessionId, string $prompt): Answer
+    {
+        $this->api->setAuthentication(new Header('X-Api-Key', $this->api->apiKey));
+
+        $data = $this->api->request(
+            method: Method::POST,
+            path: $this->api->buildPath('/assistant/session/{sessionId}', [
+                'sessionId' => $sessionId
+            ]),
+            body: json_encode(['prompt' => $prompt])
+        );
+
+        return new Answer($data);
+    }
+}
\ No newline at end of file
diff --git a/src/Resource/GeocodingResource.php b/src/Resource/GeocodingResource.php
index 21458bf..dfdcd87 100644
--- a/src/Resource/GeocodingResource.php
+++ b/src/Resource/GeocodingResource.php
@@ -5,13 +5,11 @@
 use ProgrammatorDev\Api\Method;
 use ProgrammatorDev\OpenWeatherMap\Entity\Geocoding\ZipLocation;
 use ProgrammatorDev\OpenWeatherMap\Entity\Location;
-use ProgrammatorDev\OpenWeatherMap\Util\EntityTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\EntityHelper;
 use Psr\Http\Client\ClientExceptionInterface;
 
 class GeocodingResource extends Resource
 {
-    use EntityTrait;
-
     private const NUM_RESULTS = 5;
 
     /**
@@ -31,7 +29,7 @@ public function getByLocationName(string $locationName, int $numResults = self::
             ]
         );
 
-        return $this->createEntityList(Location::class, $data);
+        return EntityHelper::createEntityList(Location::class, $data);
     }
 
     /**
@@ -70,6 +68,6 @@ public function getByCoordinate(float $latitude, float $longitude, int $numResul
             ]
         );
 
-        return $this->createEntityList(Location::class, $data);
+        return EntityHelper::createEntityList(Location::class, $data);
     }
 }
\ No newline at end of file
diff --git a/src/Test/MockResponse.php b/src/Test/MockResponse.php
index 0e5180b..ffcd0c3 100644
--- a/src/Test/MockResponse.php
+++ b/src/Test/MockResponse.php
@@ -4,6 +4,9 @@
 
 class MockResponse
 {
+    public const ASSISTANT_START_SESSION = '{"answer":"Answer text","data":{"Lisbon":{"Current UTC Time":"08 November 2025, 17:16","Current Week Day UTC":"Saturday","clouds":100,"dew_point":272.33,"dt":1762622168,"feels_like":275.34,"humidity":70,"pressure":1010,"sunrise":1762602543,"sunset":1762638067,"temp":277.19,"uvi":1.33,"visibility":10000,"weather":[{"description":"overcast clouds","icon":"04d","id":804,"main":"Clouds"}],"wind_deg":0,"wind_gust":6.17,"wind_speed":2.06}},"session_id":"62168d7b-a58d-4122-95c8-4dff55a57a76"}';
+    public const ASSISTANT_RESUME_SESSION = self::ASSISTANT_START_SESSION;
+
     public const ONE_CALL_WEATHER = '{"lat":38.7078,"lon":-9.1366,"timezone":"Europe/Lisbon","timezone_offset":3600,"current":{"dt":1688384139,"sunrise":1688361368,"sunset":1688414697,"temp":25.1,"feels_like":25.21,"pressure":1017,"humidity":59,"dew_point":16.53,"uvi":9.78,"clouds":20,"visibility":10000,"wind_speed":7.2,"wind_deg":10,"weather":[{"id":801,"main":"Clouds","description":"few 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spells","temp":{"day":24.48,"min":18.35,"max":25.38,"night":18.35,"eve":22.97,"morn":19.77},"feels_like":{"day":24.42,"night":18.07,"eve":22.55,"morn":20.15},"pressure":1021,"humidity":55,"dew_point":14.3,"wind_speed":7.17,"wind_deg":330,"wind_gust":10.71,"weather":[{"id":803,"main":"Clouds","description":"broken clouds","icon":"04d"}],"clouds":70,"pop":0,"uvi":9},{"dt":1688990400,"sunrise":1688966408,"sunset":1689019390,"moonrise":1688947980,"moonset":1688995260,"moon_phase":0.75,"summary":"There will be clear sky today","temp":{"day":25.17,"min":16.95,"max":25.65,"night":20.15,"eve":24,"morn":17.24},"feels_like":{"day":25.18,"night":20.1,"eve":23.97,"morn":17.08},"pressure":1021,"humidity":55,"dew_point":15.07,"wind_speed":6.84,"wind_deg":315,"wind_gust":8.77,"weather":[{"id":800,"main":"Clear","description":"clear sky","icon":"01d"}],"clouds":0,"pop":0,"uvi":9}],"alerts":[{"sender_name":"NWS Portland (Northwest Oregon and Southwest Washington)","event":"Heat Advisory","start":1688490000,"end":1688623200,"description":"...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TUESDAY TO 11 PM\nPDT WEDNESDAY...\n* WHAT...Maximum temperatures of 92 to 102 degrees expected\nTuesday and Wednesday. Hottest temperatures will be across\ninner portions of the Portland, Vancouver, Hillsboro, and\nSalem metropolitan areas.\n* WHERE...In Oregon, Greater Portland Metro Area and Central\nWillamette Valley. In Washington, Greater Vancouver Area.\n* WHEN...From 10 AM Tuesday to 11 PM PDT Wednesday.\n* IMPACTS...Hot temperatures may cause heat illnesses to occur.\n* ADDITIONAL DETAILS...Temperatures will struggle to fall much\nbelow 70 degrees Tuesday night for the inner urban core of\nPortland.","tags":["Extreme temperature value"]}]}';
     public const ONE_CALL_TIMEMACHINE = '{"lat":38.7078,"lon":-9.1366,"timezone":"Europe/Lisbon","timezone_offset":0,"data":[{"dt":1672531200,"sunrise":1672559671,"sunset":1672593902,"temp":17.48,"feels_like":17.16,"pressure":1019,"humidity":72,"dew_point":12.38,"clouds":20,"visibility":9999,"wind_speed":16.54,"wind_deg":337,"wind_gust":16.54,"weather":[{"id":801,"main":"Clouds","description":"few clouds","icon":"02n"}]}]}';
     public const ONE_CALL_DAY_SUMMARY = '{"lat":38.7077507,"lon":-9.1365919,"tz":"+00:00","date":"2023-01-01","units":"metric","cloud_cover":{"afternoon":75.0},"humidity":{"afternoon":71.0},"precipitation":{"total":2.53},"temperature":{"min":12.52,"max":18.29,"afternoon":18.26,"night":17.39,"evening":13.9,"morning":17.23},"pressure":{"afternoon":1017.0},"wind":{"max":{"speed":26.38,"direction":225.0}}}';
diff --git a/src/UnitSystem/UnitSystem.php b/src/UnitSystem/UnitSystem.php
index b7239d3..593f853 100644
--- a/src/UnitSystem/UnitSystem.php
+++ b/src/UnitSystem/UnitSystem.php
@@ -2,18 +2,16 @@
 
 namespace ProgrammatorDev\OpenWeatherMap\UnitSystem;
 
-use ProgrammatorDev\OpenWeatherMap\Util\ReflectionTrait;
+use ProgrammatorDev\OpenWeatherMap\Helper\ReflectionHelper;
 
 class UnitSystem
 {
-    use ReflectionTrait;
-
     public const METRIC = 'metric';
     public const IMPERIAL = 'imperial';
     public const STANDARD = 'standard';
 
     public static function getOptions(): array
     {
-        return (new UnitSystem)->getClassConstants(self::class);
+        return ReflectionHelper::getClassConstants(self::class);
     }
 }
\ No newline at end of file
diff --git a/src/Util/EntityTrait.php b/src/Util/EntityTrait.php
deleted file mode 100644
index 24ee6ce..0000000
--- a/src/Util/EntityTrait.php
+++ /dev/null
@@ -1,13 +0,0 @@
-<?php
-
-namespace ProgrammatorDev\OpenWeatherMap\Util;
-
-trait EntityTrait
-{
-    private function createEntityList(string $entityClass, array $list): array
-    {
-        return array_map(function(array $data) use ($entityClass) {
-            return new $entityClass($data);
-        }, $list);
-    }
-}
\ No newline at end of file
diff --git a/tests/Integration/AssistantResourceTest.php b/tests/Integration/AssistantResourceTest.php
new file mode 100644
index 0000000..162c3d6
--- /dev/null
+++ b/tests/Integration/AssistantResourceTest.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Test\Integration;
+
+use ProgrammatorDev\OpenWeatherMap\Entity\Assistant\Answer;
+use ProgrammatorDev\OpenWeatherMap\Test\AbstractTest;
+use ProgrammatorDev\OpenWeatherMap\Test\MockResponse;
+use ProgrammatorDev\OpenWeatherMap\Test\Util\TestItemResponseTrait;
+
+class AssistantResourceTest extends AbstractTest
+{
+    use TestItemResponseTrait;
+
+    public static function provideItemResponseData(): \Generator
+    {
+        yield 'start session' => [
+            Answer::class,
+            MockResponse::ASSISTANT_START_SESSION,
+            'assistant',
+            'startSession',
+            ['prompt']
+        ];
+        yield 'resume session' => [
+            Answer::class,
+            MockResponse::ASSISTANT_RESUME_SESSION,
+            'assistant',
+            'resumeSession',
+            ['session-id', 'prompt']
+        ];
+    }
+}
\ No newline at end of file
diff --git a/tests/Unit/Assistant/AnswerTest.php b/tests/Unit/Assistant/AnswerTest.php
new file mode 100644
index 0000000..980c527
--- /dev/null
+++ b/tests/Unit/Assistant/AnswerTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Test\Unit\Assistant;
+
+use ProgrammatorDev\OpenWeatherMap\Entity\Assistant\Answer;
+use ProgrammatorDev\OpenWeatherMap\Entity\Assistant\WeatherData;
+use ProgrammatorDev\OpenWeatherMap\Test\AbstractTest;
+
+class AnswerTest extends AbstractTest
+{
+    public function testMethods()
+    {
+        $entity = new Answer([
+            'answer' => 'Answer text',
+            'data' => [
+                'location' => [
+                    'clouds' => 100,
+                    'dew_point' => 10,
+                    'dt' => 1762622549,
+                    'feels_like' => 10,
+                    'humidity' => 10,
+                    'pressure' => 1000,
+                    'sunrise' => 1762602543,
+                    'sunset' => 1762638067,
+                    'temp' => 10,
+                    'uvi' => 1,
+                    'visibility' => 10000,
+                    'weather' => [
+                        [
+                            'description' => 'description',
+                            'icon' => '01d',
+                            'id' => 200,
+                            'main' => 'name'
+                        ]
+                    ],
+                    'wind_deg' => 10,
+                    'wind_speed' => 10,
+                    'wind_gust' => 10,
+                ]
+            ],
+            'session_id' => '777f049a-c96b-423f-baef-ca34ff725fe9'
+        ]);
+
+        $this->assertSame('Answer text', $entity->getAnswer());
+        $this->assertSame('777f049a-c96b-423f-baef-ca34ff725fe9', $entity->getSessionId());
+        $this->assertContainsOnlyInstancesOf(WeatherData::class, $entity->getData());
+    }
+}
\ No newline at end of file
diff --git a/tests/Unit/Assistant/WeatherDataTest.php b/tests/Unit/Assistant/WeatherDataTest.php
new file mode 100644
index 0000000..080b3aa
--- /dev/null
+++ b/tests/Unit/Assistant/WeatherDataTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace ProgrammatorDev\OpenWeatherMap\Test\Unit\Assistant;
+
+use ProgrammatorDev\OpenWeatherMap\Entity\Assistant\WeatherData;
+use ProgrammatorDev\OpenWeatherMap\Entity\Condition;
+use ProgrammatorDev\OpenWeatherMap\Entity\Wind;
+use ProgrammatorDev\OpenWeatherMap\Test\AbstractTest;
+
+class WeatherDataTest extends AbstractTest
+{
+    public function testMethods()
+    {
+        $entity = new WeatherData('locationName', [
+            'clouds' => 100,
+            'dew_point' => 10,
+            'dt' => 1762622549,
+            'feels_like' => 10,
+            'humidity' => 10,
+            'pressure' => 1000,
+            'sunrise' => 1762602543,
+            'sunset' => 1762638067,
+            'temp' => 10,
+            'uvi' => 1,
+            'visibility' => 10000,
+            'weather' => [
+                [
+                    'description' => 'description',
+                    'icon' => '01d',
+                    'id' => 200,
+                    'main' => 'name'
+                ]
+            ],
+            'wind_deg' => 10,
+            'wind_speed' => 10,
+            'wind_gust' => 10,
+        ]);
+
+        $this->assertSame('locationName', $entity->getLocationName());
+        $this->assertInstanceOf(\DateTimeImmutable::class, $entity->getDateTime());
+        $this->assertSame(1000, $entity->getAtmosphericPressure());
+        $this->assertSame(10, $entity->getHumidity());
+        $this->assertSame(10.0, $entity->getDewPoint());
+        $this->assertSame(1.0, $entity->getUltraVioletIndex());
+        $this->assertSame(100, $entity->getCloudiness());
+        $this->assertInstanceOf(Wind::class, $entity->getWind());
+        $this->assertContainsOnlyInstancesOf(Condition::class, $entity->getConditions());
+        $this->assertSame(10.0, $entity->getTemperature());
+        $this->assertSame(10.0, $entity->getTemperatureFeelsLike());
+        $this->assertSame(10000, $entity->getVisibility());
+        $this->assertInstanceOf(\DateTimeImmutable::class, $entity->getSunriseAt());
+        $this->assertInstanceOf(\DateTimeImmutable::class, $entity->getSunsetAt());
+    }
+}
\ No newline at end of file