diff --git a/google/cloud/dialogflow_v2beta1/services/participants/async_client.py b/google/cloud/dialogflow_v2beta1/services/participants/async_client.py
index 213eae8dc..8f175cf5e 100644
--- a/google/cloud/dialogflow_v2beta1/services/participants/async_client.py
+++ b/google/cloud/dialogflow_v2beta1/services/participants/async_client.py
@@ -364,7 +364,7 @@ async def list_participants(
         Returns:
             google.cloud.dialogflow_v2beta1.services.participants.pagers.ListParticipantsAsyncPager:
                 The response message for
-                   [Participants.ListParticipants][google.cloud.dialogflow.v2beta1.Participants.ListParticipants].
+                [Participants.ListParticipants][google.cloud.dialogflow.v2beta1.Participants.ListParticipants].
 
                 Iterating over this object will yield results and
                 resolve additional pages automatically.
@@ -545,7 +545,7 @@ async def analyze_content(
         Returns:
             google.cloud.dialogflow_v2beta1.types.AnalyzeContentResponse:
                 The response message for
-                   [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent].
+                [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent].
 
         """
         # Create or coerce a protobuf request object.
@@ -640,7 +640,7 @@ async def suggest_articles(
         Returns:
             google.cloud.dialogflow_v2beta1.types.SuggestArticlesResponse:
                 The response message for
-                   [Participants.SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles].
+                [Participants.SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles].
 
         """
         # Create or coerce a protobuf request object.
@@ -713,7 +713,7 @@ async def suggest_faq_answers(
         Returns:
             google.cloud.dialogflow_v2beta1.types.SuggestFaqAnswersResponse:
                 The request message for
-                   [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers].
+                [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers].
 
         """
         # Create or coerce a protobuf request object.
@@ -786,7 +786,7 @@ async def suggest_smart_replies(
         Returns:
             google.cloud.dialogflow_v2beta1.types.SuggestSmartRepliesResponse:
                 The response message for
-                   [Participants.SuggestSmartReplies][google.cloud.dialogflow.v2beta1.Participants.SuggestSmartReplies].
+                [Participants.SuggestSmartReplies][google.cloud.dialogflow.v2beta1.Participants.SuggestSmartReplies].
 
         """
         # Create or coerce a protobuf request object.
@@ -868,7 +868,7 @@ async def list_suggestions(
         Returns:
             google.cloud.dialogflow_v2beta1.services.participants.pagers.ListSuggestionsAsyncPager:
                 The response message for
-                   [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions].
+                [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions].
 
                 Iterating over this object will yield results and
                 resolve additional pages automatically.
@@ -944,7 +944,7 @@ async def compile_suggestion(
         Returns:
             google.cloud.dialogflow_v2beta1.types.CompileSuggestionResponse:
                 The response message for
-                   [Participants.CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion].
+                [Participants.CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion].
 
         """
         warnings.warn(
diff --git a/google/cloud/dialogflow_v2beta1/services/participants/client.py b/google/cloud/dialogflow_v2beta1/services/participants/client.py
index e24c2f407..ba6083695 100644
--- a/google/cloud/dialogflow_v2beta1/services/participants/client.py
+++ b/google/cloud/dialogflow_v2beta1/services/participants/client.py
@@ -623,7 +623,7 @@ def list_participants(
         Returns:
             google.cloud.dialogflow_v2beta1.services.participants.pagers.ListParticipantsPager:
                 The response message for
-                   [Participants.ListParticipants][google.cloud.dialogflow.v2beta1.Participants.ListParticipants].
+                [Participants.ListParticipants][google.cloud.dialogflow.v2beta1.Participants.ListParticipants].
 
                 Iterating over this object will yield results and
                 resolve additional pages automatically.
@@ -804,7 +804,7 @@ def analyze_content(
         Returns:
             google.cloud.dialogflow_v2beta1.types.AnalyzeContentResponse:
                 The response message for
-                   [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent].
+                [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent].
 
         """
         # Create or coerce a protobuf request object.
@@ -890,7 +890,7 @@ def suggest_articles(
         Returns:
             google.cloud.dialogflow_v2beta1.types.SuggestArticlesResponse:
                 The response message for
-                   [Participants.SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles].
+                [Participants.SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles].
 
         """
         # Create or coerce a protobuf request object.
@@ -963,7 +963,7 @@ def suggest_faq_answers(
         Returns:
             google.cloud.dialogflow_v2beta1.types.SuggestFaqAnswersResponse:
                 The request message for
-                   [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers].
+                [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers].
 
         """
         # Create or coerce a protobuf request object.
@@ -1036,7 +1036,7 @@ def suggest_smart_replies(
         Returns:
             google.cloud.dialogflow_v2beta1.types.SuggestSmartRepliesResponse:
                 The response message for
-                   [Participants.SuggestSmartReplies][google.cloud.dialogflow.v2beta1.Participants.SuggestSmartReplies].
+                [Participants.SuggestSmartReplies][google.cloud.dialogflow.v2beta1.Participants.SuggestSmartReplies].
 
         """
         # Create or coerce a protobuf request object.
@@ -1118,7 +1118,7 @@ def list_suggestions(
         Returns:
             google.cloud.dialogflow_v2beta1.services.participants.pagers.ListSuggestionsPager:
                 The response message for
-                   [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions].
+                [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions].
 
                 Iterating over this object will yield results and
                 resolve additional pages automatically.
@@ -1195,7 +1195,7 @@ def compile_suggestion(
         Returns:
             google.cloud.dialogflow_v2beta1.types.CompileSuggestionResponse:
                 The response message for
-                   [Participants.CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion].
+                [Participants.CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion].
 
         """
         warnings.warn(
diff --git a/google/cloud/dialogflow_v2beta1/types/audio_config.py b/google/cloud/dialogflow_v2beta1/types/audio_config.py
index e0d0e772e..32e1fd710 100644
--- a/google/cloud/dialogflow_v2beta1/types/audio_config.py
+++ b/google/cloud/dialogflow_v2beta1/types/audio_config.py
@@ -405,13 +405,15 @@ class SpeechToTextConfig(proto.Message):
 
     Attributes:
         speech_model_variant (google.cloud.dialogflow_v2beta1.types.SpeechModelVariant):
-            Optional. The speech model used in speech to text.
+            The speech model used in speech to text.
             ``SPEECH_MODEL_VARIANT_UNSPECIFIED``, ``USE_BEST_AVAILABLE``
             will be treated as ``USE_ENHANCED``. It can be overridden in
             [AnalyzeContentRequest][google.cloud.dialogflow.v2beta1.AnalyzeContentRequest]
             and
             [StreamingAnalyzeContentRequest][google.cloud.dialogflow.v2beta1.StreamingAnalyzeContentRequest]
-            request.
+            request. If enhanced model variant is specified and an
+            enhanced version of the specified model for the language
+            does not exist, then it would emit an error.
     """
 
     speech_model_variant = proto.Field(proto.ENUM, number=1, enum="SpeechModelVariant",)
diff --git a/google/cloud/dialogflow_v2beta1/types/document.py b/google/cloud/dialogflow_v2beta1/types/document.py
index e4edae621..89aae8027 100644
--- a/google/cloud/dialogflow_v2beta1/types/document.py
+++ b/google/cloud/dialogflow_v2beta1/types/document.py
@@ -385,6 +385,9 @@ class KnowledgeOperationMetadata(proto.Message):
         state (google.cloud.dialogflow_v2beta1.types.KnowledgeOperationMetadata.State):
             Required. Output only. The current state of
             this operation.
+        knowledge_base (str):
+            The name of the knowledge base interacted
+            with during the operation.
     """
 
     class State(proto.Enum):
@@ -395,6 +398,7 @@ class State(proto.Enum):
         DONE = 3
 
     state = proto.Field(proto.ENUM, number=1, enum=State,)
+    knowledge_base = proto.Field(proto.STRING, number=3,)
 
 
 class ReloadDocumentRequest(proto.Message):
diff --git a/google/cloud/dialogflow_v2beta1/types/participant.py b/google/cloud/dialogflow_v2beta1/types/participant.py
index b6cdefe6b..dfb147c9d 100644
--- a/google/cloud/dialogflow_v2beta1/types/participant.py
+++ b/google/cloud/dialogflow_v2beta1/types/participant.py
@@ -123,14 +123,14 @@ class Participant(proto.Message):
 
             ::
 
-                documents_metadata_filters {
-                  key: "market"
-                  value: "US,CA"
-                }
-                documents_metadata_filters {
-                  key: "user"
-                  value: "agent"
-                }
+               documents_metadata_filters {
+                 key: "market"
+                 value: "US,CA"
+               }
+               documents_metadata_filters {
+                 key: "user"
+                 value: "agent"
+               }
     """
 
     class Role(proto.Enum):
@@ -424,14 +424,14 @@ class AssistQueryParameters(proto.Message):
 
             ::
 
-                documents_metadata_filters {
-                  key: "market"
-                  value: "US,CA"
-                }
-                documents_metadata_filters {
-                  key: "user"
-                  value: "agent"
-                }
+               documents_metadata_filters {
+                 key: "market"
+                 value: "US,CA"
+               }
+               documents_metadata_filters {
+                 key: "user"
+                 value: "agent"
+               }
     """
 
     documents_metadata_filters = proto.MapField(proto.STRING, proto.STRING, number=1,)