diff --git a/src/Infrastructure/BotSharp.Abstraction/Conversations/Enums/ChatEvent.cs b/src/Infrastructure/BotSharp.Abstraction/Conversations/Enums/ChatEvent.cs
index 0d68fef7d..b81cf3fda 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Conversations/Enums/ChatEvent.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Conversations/Enums/ChatEvent.cs
@@ -5,6 +5,7 @@ public static class ChatEvent
     public const string OnConversationInitFromClient = nameof(OnConversationInitFromClient);
     public const string OnMessageReceivedFromClient = nameof(OnMessageReceivedFromClient);
     public const string OnMessageReceivedFromAssistant = nameof(OnMessageReceivedFromAssistant);
+    public const string OnIntermediateMessageReceivedFromAssistant = nameof(OnIntermediateMessageReceivedFromAssistant);
 
     public const string OnMessageDeleted = nameof(OnMessageDeleted);
     public const string OnNotificationGenerated = nameof(OnNotificationGenerated);
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileSelectContext.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileSelectContext.cs
index 43d4f7797..0a9f6f1dc 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileSelectContext.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileSelectContext.cs
@@ -16,7 +16,4 @@ public class FileSelectItem
 
     [JsonPropertyName("file_source")]
     public string FileSource { get; set; }
-
-    [JsonPropertyName("file_name")]
-    public string? FileName { get; set; }
 }
\ No newline at end of file
diff --git a/src/Infrastructure/BotSharp.Abstraction/MessageHub/Models/HubObserveData.cs b/src/Infrastructure/BotSharp.Abstraction/MessageHub/Models/HubObserveData.cs
index d345ab86d..1450ff617 100644
--- a/src/Infrastructure/BotSharp.Abstraction/MessageHub/Models/HubObserveData.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/MessageHub/Models/HubObserveData.cs
@@ -2,5 +2,13 @@ namespace BotSharp.Abstraction.MessageHub.Models;
 
 public class HubObserveData<TData> : ObserveDataBase where TData : class, new()
 {
+    /// <summary>
+    /// The observed data
+    /// </summary>
     public TData Data { get; set; } = null!;
+
+    /// <summary>
+    /// Whether to save the observed data To Db
+    /// </summary>
+    public bool SaveDataToDb { get; set; }
 }
diff --git a/src/Infrastructure/BotSharp.Core/Demo/Functions/GetWeatherFn.cs b/src/Infrastructure/BotSharp.Core/Demo/Functions/GetWeatherFn.cs
index 6465b88e5..8b0411fe8 100644
--- a/src/Infrastructure/BotSharp.Core/Demo/Functions/GetWeatherFn.cs
+++ b/src/Infrastructure/BotSharp.Core/Demo/Functions/GetWeatherFn.cs
@@ -36,6 +36,17 @@ public async Task<bool> Execute(RoleDialogModel message)
 
         await Task.Delay(1500);
 
+#if DEBUG
+        var temp = RoleDialogModel.From(message, AgentRole.Assistant, $"Here is your weather in {args?.City}");
+        messageHub.Push(new()
+        {
+            EventName = ChatEvent.OnIntermediateMessageReceivedFromAssistant,
+            Data = temp,
+            RefId = conv.ConversationId,
+            SaveDataToDb = true
+        });
+#endif
+
         message.Indication = $"Still working on it... Hold on, {args?.City}";
         messageHub.Push(new()
         {
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs
index 6478488cc..723dd2ca5 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs
@@ -1,5 +1,6 @@
 using BotSharp.Abstraction.Instructs.Models;
 using BotSharp.Abstraction.Instructs;
+using BotSharp.Abstraction.Files.Converters;
 
 namespace BotSharp.Core.Files.Services;
 
@@ -22,13 +23,16 @@ public async Task<string> ReadPdf(string text, List<InstructFileModel> files, In
         {
             var provider = options?.Provider ?? "openai";
             var pdfFiles = await DownloadAndSaveFiles(sessionDir, files);
-
             var targetFiles = pdfFiles;
-            if (provider != "google-ai")
+
+            var converter = GetImageConverter(options?.ImageConvertProvider);
+            if (converter == null && provider == "openai")
             {
-                targetFiles = await ConvertPdfToImages(pdfFiles, options);
+                var fileCoreSettings = _services.GetRequiredService<FileCoreSettings>();
+                converter = GetImageConverter(fileCoreSettings?.ImageConverter?.Provider);
             }
 
+            targetFiles = await ConvertPdfToImages(converter, pdfFiles);
             if (targetFiles.IsNullOrEmpty())
             {
                 return content;
@@ -115,15 +119,12 @@ private async Task<IEnumerable<string>> DownloadAndSaveFiles(string dir, List<In
         return locs;
     }
 
-    private async Task<IEnumerable<string>> ConvertPdfToImages(IEnumerable<string> files, InstructOptions? options = null)
+    private async Task<IEnumerable<string>> ConvertPdfToImages(IImageConverter converter, IEnumerable<string> files)
     {
         var images = new List<string>();
-        var settings = _services.GetRequiredService<FileCoreSettings>();
-
-        var converter = GetImageConverter(options?.ImageConvertProvider);
         if (converter == null || files.IsNullOrEmpty())
         {
-            return images;
+            return files;
         }
 
         foreach (var file in files)
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.cs
index 76c439fae..5f74bc1b4 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.cs
@@ -91,9 +91,7 @@ private string BuildFileName(string? name, string? extension, string defaultName
 
     private IImageConverter? GetImageConverter(string? provider)
     {
-        var settings = _services.GetRequiredService<FileCoreSettings>();
-        var convertProvider = provider ?? settings?.ImageConverter?.Provider;
-        var converter = _services.GetServices<IImageConverter>().FirstOrDefault(x => x.Provider == convertProvider);
+        var converter = _services.GetServices<IImageConverter>().FirstOrDefault(x => x.Provider == provider);
         return converter;
     }
     #endregion
diff --git a/src/Infrastructure/BotSharp.Core/Instructs/Functions/ExecuteTemplateFn.cs b/src/Infrastructure/BotSharp.Core/Instructs/Functions/ExecuteTemplateFn.cs
index 9173b587d..b81c56910 100644
--- a/src/Infrastructure/BotSharp.Core/Instructs/Functions/ExecuteTemplateFn.cs
+++ b/src/Infrastructure/BotSharp.Core/Instructs/Functions/ExecuteTemplateFn.cs
@@ -61,17 +61,6 @@ private async Task<string> GetAiResponse(Agent agent, string templateName)
                 new(AgentRole.User, text)
             });
 
-            await HookEmitter.Emit<IInstructHook>(_services, async hook =>
-                await hook.OnResponseGenerated(new InstructResponseModel
-                {
-                    AgentId = agent.Id,
-                    TemplateName = templateName,
-                    Provider = completion.Provider,
-                    Model = completion.Model,
-                    UserMessage = text,
-                    CompletionText = response.Content
-                }), agent.Id);
-
             return response.Content;
         }
         catch (Exception ex)
diff --git a/src/Infrastructure/BotSharp.Core/data/agents/01fcc3e5-9af7-49e6-ad7a-a760bd12dc4a/instructions/instruction.liquid b/src/Infrastructure/BotSharp.Core/data/agents/01fcc3e5-9af7-49e6-ad7a-a760bd12dc4a/instructions/instruction.liquid
index 1ada18504..e9fe5e0cc 100644
--- a/src/Infrastructure/BotSharp.Core/data/agents/01fcc3e5-9af7-49e6-ad7a-a760bd12dc4a/instructions/instruction.liquid
+++ b/src/Infrastructure/BotSharp.Core/data/agents/01fcc3e5-9af7-49e6-ad7a-a760bd12dc4a/instructions/instruction.liquid
@@ -1,5 +1,5 @@
 You're {{router.name}} ({{router.description}}). 
-You can understand messages sent by users in different languages, and route the request to appropriate agent.
+You can route the request to appropriate agent. Default language is English(US).
 Follow these steps to handle user request:
 1. Read the [CONVERSATION] content.
 2. Determine which agent is suitable to handle this conversation. Try to minimize the routing of human service.
diff --git a/src/Plugins/BotSharp.Plugin.ChatHub/Helpers/EventEmitter.cs b/src/Plugins/BotSharp.Plugin.ChatHub/Helpers/EventEmitter.cs
index 7c2b40778..821b173e3 100644
--- a/src/Plugins/BotSharp.Plugin.ChatHub/Helpers/EventEmitter.cs
+++ b/src/Plugins/BotSharp.Plugin.ChatHub/Helpers/EventEmitter.cs
@@ -3,9 +3,9 @@
 
 namespace BotSharp.Plugin.ChatHub.Helpers;
 
-public class EventEmitter
+internal class EventEmitter
 {
-    public static async Task SendChatEvent<T>(
+    internal static async Task SendChatEvent<T>(
         IServiceProvider services,
         ILogger logger,
         string @event,
diff --git a/src/Plugins/BotSharp.Plugin.ChatHub/Observers/ChatHubObserver.cs b/src/Plugins/BotSharp.Plugin.ChatHub/Observers/ChatHubObserver.cs
index 03a56d47b..3d8bf7886 100644
--- a/src/Plugins/BotSharp.Plugin.ChatHub/Observers/ChatHubObserver.cs
+++ b/src/Plugins/BotSharp.Plugin.ChatHub/Observers/ChatHubObserver.cs
@@ -121,6 +121,32 @@ public override void OnNext(HubObserveData<RoleDialogModel> value)
                 _logger.LogCritical($"Receiving {value.EventName} ({value.Data.Indication}) in {nameof(ChatHubObserver)} - {conv.ConversationId}");
 #endif
                 break;
+            case ChatEvent.OnIntermediateMessageReceivedFromAssistant:
+                if (!AllowSendingMessage()) return;
+
+                model = new ChatResponseDto
+                {
+                    ConversationId = conv.ConversationId,
+                    MessageId = message.MessageId,
+                    MessageLabel = message.MessageLabel,
+                    Text = !string.IsNullOrEmpty(message.SecondaryContent) ? message.SecondaryContent : message.Content,
+                    Function = message.FunctionName,
+                    RichContent = message.SecondaryRichContent ?? message.RichContent,
+                    Data = message.Data,
+                    Sender = new()
+                    {
+                        FirstName = "AI",
+                        LastName = "Assistant",
+                        Role = AgentRole.Assistant
+                    }
+                };
+
+                if (value.SaveDataToDb)
+                {
+                    var storage = _services.GetRequiredService<IConversationStorage>();
+                    storage.Append(conv.ConversationId, message);
+                }
+                break;
         }
 
         SendEvent(value.EventName, model.ConversationId, model);
diff --git a/src/Plugins/BotSharp.Plugin.ExcelHandler/BotSharp.Plugin.ExcelHandler.csproj b/src/Plugins/BotSharp.Plugin.ExcelHandler/BotSharp.Plugin.ExcelHandler.csproj
index 51355e9c6..5a30ca72a 100644
--- a/src/Plugins/BotSharp.Plugin.ExcelHandler/BotSharp.Plugin.ExcelHandler.csproj
+++ b/src/Plugins/BotSharp.Plugin.ExcelHandler/BotSharp.Plugin.ExcelHandler.csproj
@@ -34,7 +34,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\Infrastructure\BotSharp.Core\BotSharp.Core.csproj" />
-    <ProjectReference Include="..\BotSharp.Plugin.SqlDriver\BotSharp.Plugin.SqlDriver.csproj" />
   </ItemGroup>
 
 </Project>
diff --git a/src/Plugins/BotSharp.Plugin.ExcelHandler/Functions/ReadExcelFn.cs b/src/Plugins/BotSharp.Plugin.ExcelHandler/Functions/ReadExcelFn.cs
index 3530a8edd..822a94fe6 100644
--- a/src/Plugins/BotSharp.Plugin.ExcelHandler/Functions/ReadExcelFn.cs
+++ b/src/Plugins/BotSharp.Plugin.ExcelHandler/Functions/ReadExcelFn.cs
@@ -1,4 +1,3 @@
-using BotSharp.Plugin.ExcelHandler.Settings;
 using NPOI.SS.UserModel;
 using NPOI.XSSF.UserModel;
 using System.Linq.Dynamic.Core;
@@ -32,7 +31,7 @@ public ReadExcelFn(
         _options = options;
         _settings = settings;
         _fileStorage = fileStorage;
-        _dbService = dbServices.FirstOrDefault(x => x.Provider == _settings.DbProvider);
+        _dbService = dbServices.FirstOrDefault(x => x.Provider == _settings.Database?.Provider);
     }
 
     public async Task<bool> Execute(RoleDialogModel message)
diff --git a/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/MySqlService.cs b/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/MySqlService.cs
index 87d7e54cb..8d491ab3b 100644
--- a/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/MySqlService.cs
+++ b/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/MySqlService.cs
@@ -1,9 +1,8 @@
-using System.Data;
-using System.Text.RegularExpressions;
-using BotSharp.Plugin.SqlDriver.Settings;
 using MySql.Data.MySqlClient;
 using Newtonsoft.Json;
 using NPOI.SS.UserModel;
+using System.Data;
+using System.Text.RegularExpressions;
 
 namespace BotSharp.Plugin.ExcelHandler.Services;
 
@@ -11,6 +10,7 @@ public class MySqlService : IDbService
 {
     private readonly IServiceProvider _services;
     private readonly ILogger<MySqlService> _logger;
+    private readonly ExcelHandlerSettings _settings;
 
     private string _mysqlConnection = "";
     private double _excelRowSize = 0;
@@ -23,10 +23,12 @@ public class MySqlService : IDbService
 
     public MySqlService(
         IServiceProvider services,
-        ILogger<MySqlService> logger)
+        ILogger<MySqlService> logger,
+        ExcelHandlerSettings settings)
     {
         _services = services;
         _logger = logger;
+        _settings = settings;
     }
 
     public string Provider => "mysql";
@@ -250,8 +252,7 @@ private MySqlConnection GetDbConnection()
 
     private void InitializeDatabase()
     {
-        var sqlSettings = _services.GetRequiredService<SqlDriverSetting>();
-        _mysqlConnection = sqlSettings.MySqlTempConnectionString;
+        _mysqlConnection = _settings.Database.ConnectionString;
         var databaseName = GetDatabaseName(_mysqlConnection);
         _logger.LogInformation($"Connected to MySQL database {databaseName}");
     }
diff --git a/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/SqliteService.cs b/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/SqliteService.cs
index b02d7a5fb..e301ec5b2 100644
--- a/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/SqliteService.cs
+++ b/src/Plugins/BotSharp.Plugin.ExcelHandler/Services/SqliteService.cs
@@ -1,4 +1,3 @@
-using BotSharp.Plugin.SqlDriver.Settings;
 using Microsoft.Data.Sqlite;
 using NPOI.SS.UserModel;
 
@@ -8,6 +7,7 @@ public class SqliteService : IDbService
 {
     private readonly IServiceProvider _services;
     private readonly ILogger<SqliteService> _logger;
+    private readonly ExcelHandlerSettings _settings;
 
     private string _dbFilePath = string.Empty;
     private SqliteConnection _inMemoryDbConnection = null;
@@ -20,10 +20,12 @@ public class SqliteService : IDbService
 
     public SqliteService(
         IServiceProvider services,
-        ILogger<SqliteService> logger)
+        ILogger<SqliteService> logger,
+        ExcelHandlerSettings settings)
     {
         _services = services;
         _logger = logger;
+        _settings = settings;
     }
 
     public string Provider => "sqlite";
@@ -251,8 +253,7 @@ private SqliteConnection GetPhysicalDbConnection()
     {
         if (string.IsNullOrEmpty(_dbFilePath))
         {
-            var sqlSettings = _services.GetRequiredService<SqlDriverSetting>();
-            _dbFilePath = sqlSettings.SqlLiteConnectionString;
+            _dbFilePath = _settings.Database.ConnectionString;
         }
 
         var dbConnection = new SqliteConnection($"Data Source={_dbFilePath};Mode=ReadWrite");
diff --git a/src/Plugins/BotSharp.Plugin.ExcelHandler/Settings/ExcelHandlerSettings.cs b/src/Plugins/BotSharp.Plugin.ExcelHandler/Settings/ExcelHandlerSettings.cs
index a8aa9e978..d68af4b3d 100644
--- a/src/Plugins/BotSharp.Plugin.ExcelHandler/Settings/ExcelHandlerSettings.cs
+++ b/src/Plugins/BotSharp.Plugin.ExcelHandler/Settings/ExcelHandlerSettings.cs
@@ -2,5 +2,11 @@ namespace BotSharp.Plugin.ExcelHandler.Settings;
 
 public class ExcelHandlerSettings
 {
-    public string DbProvider { get; set; } = "mysql";
+    public DatabaseSettings Database { get; set; }
 }
+
+public class DatabaseSettings
+{
+    public string Provider { get; set; } = "mysql";
+    public string ConnectionString { get; set; }
+}
\ No newline at end of file
diff --git a/src/Plugins/BotSharp.Plugin.ExcelHandler/Using.cs b/src/Plugins/BotSharp.Plugin.ExcelHandler/Using.cs
index 6f5a0c335..1c338f5f6 100644
--- a/src/Plugins/BotSharp.Plugin.ExcelHandler/Using.cs
+++ b/src/Plugins/BotSharp.Plugin.ExcelHandler/Using.cs
@@ -26,6 +26,7 @@
 global using BotSharp.Plugin.ExcelHandler.LlmContexts;
 global using BotSharp.Plugin.ExcelHandler.Models;
 global using BotSharp.Plugin.ExcelHandler.Services;
+global using BotSharp.Plugin.ExcelHandler.Settings;
 
 global using Microsoft.Extensions.Logging;
 global using Microsoft.Extensions.DependencyInjection;
diff --git a/src/Plugins/BotSharp.Plugin.SqlDriver/Settings/SqlDriverSetting.cs b/src/Plugins/BotSharp.Plugin.SqlDriver/Settings/SqlDriverSetting.cs
index bff2c48c8..67acab47c 100644
--- a/src/Plugins/BotSharp.Plugin.SqlDriver/Settings/SqlDriverSetting.cs
+++ b/src/Plugins/BotSharp.Plugin.SqlDriver/Settings/SqlDriverSetting.cs
@@ -5,11 +5,9 @@ public class SqlDriverSetting
     public string DatabaseType { get; set; } = "mysql";
     public string MySqlConnectionString { get; set; } = null!;
     public string MySqlExecutionConnectionString { get; set; } = null!;
-    public string MySqlTempConnectionString { get; set; } = null!;
     public string MySqlMetaConnectionString { get; set; } = null!;
     public string SqlServerConnectionString { get; set; } = null!;
     public string SqlServerExecutionConnectionString { get; set; } = null!;
-    public string SqlLiteConnectionString { get; set; } = null!;
     public string RedshiftConnectionString { get; set; } = null!;
     public bool ExecuteSqlSelectAutonomous { get; set; } = false;
     public bool FormattingResult { get; set; } = true;
diff --git a/src/WebStarter/appsettings.json b/src/WebStarter/appsettings.json
index a6d523054..c55e9e2c1 100644
--- a/src/WebStarter/appsettings.json
+++ b/src/WebStarter/appsettings.json
@@ -472,7 +472,10 @@
   },
 
   "ExcelHandler": {
-    "DbProvider": "mysql"
+    "Database": {
+      "Provider": "mysql",
+      "ConnectionString": ""
+    }
   },
 
   "HttpHandler": {