diff --git a/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/fulfillment.py b/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/fulfillment.py
index 2956b7d032fb..6fc7ee2ec318 100644
--- a/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/fulfillment.py
+++ b/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/fulfillment.py
@@ -70,10 +70,10 @@ class Fulfillment(proto.Message):
 
     class GenericWebService(proto.Message):
         r"""Represents configuration for a generic web service.
-        Dialogflow supports two mechanisms for authentications: - Basic
-        authentication with username and password.
-        - Authentication with additional authentication headers. More
-        information could be found at:
+        Dialogflow supports two mechanisms for authentications:
+        - Basic authentication with username and password.
+        - Authentication with additional authentication headers.
+        More information could be found at:
         https://cloud.google.com/dialogflow/docs/fulfillment-configure.
 
         Attributes:
diff --git a/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/participant.py b/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/participant.py
index ccd6a909f314..4b4ec91fbb49 100644
--- a/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/participant.py
+++ b/packages/google-cloud-dialogflow/google/cloud/dialogflow_v2/types/participant.py
@@ -358,6 +358,14 @@ class AnalyzeContentRequest(proto.Message):
             query.
         assist_query_params (google.cloud.dialogflow_v2.types.AssistQueryParameters):
             Parameters for a human assist query.
+        cx_parameters (google.protobuf.struct_pb2.Struct):
+            Additional parameters to be put into
+            Dialogflow CX session parameters. To remove a
+            parameter from the session, clients should
+            explicitly set the parameter value to null.
+
+            Note: this field should only be used if you are
+            connecting to a Dialogflow CX agent.
         request_id (str):
             A unique identifier for this request. Restricted to 36 ASCII
             characters. A random UUID is recommended. This request is
@@ -395,6 +403,11 @@ class AnalyzeContentRequest(proto.Message):
         number=14,
         message="AssistQueryParameters",
     )
+    cx_parameters = proto.Field(
+        proto.MESSAGE,
+        number=18,
+        message=struct_pb2.Struct,
+    )
     request_id = proto.Field(
         proto.STRING,
         number=11,
diff --git a/packages/google-cloud-dialogflow/scripts/fixup_dialogflow_v2_keywords.py b/packages/google-cloud-dialogflow/scripts/fixup_dialogflow_v2_keywords.py
index 9b376106e39d..bad839925b4e 100644
--- a/packages/google-cloud-dialogflow/scripts/fixup_dialogflow_v2_keywords.py
+++ b/packages/google-cloud-dialogflow/scripts/fixup_dialogflow_v2_keywords.py
@@ -39,7 +39,7 @@ def partition(
 class dialogflowCallTransformer(cst.CSTTransformer):
     CTRL_PARAMS: Tuple[str] = ('retry', 'timeout', 'metadata')
     METHOD_TO_PARAMS: Dict[str, Tuple[str]] = {
-        'analyze_content': ('participant', 'text_input', 'event_input', 'reply_audio_config', 'query_params', 'assist_query_params', 'request_id', ),
+        'analyze_content': ('participant', 'text_input', 'event_input', 'reply_audio_config', 'query_params', 'assist_query_params', 'cx_parameters', 'request_id', ),
         'batch_create_entities': ('parent', 'entities', 'language_code', ),
         'batch_delete_entities': ('parent', 'entity_values', 'language_code', ),
         'batch_delete_entity_types': ('parent', 'entity_type_names', ),