diff --git a/api/services/conversation_service.py b/api/services/conversation_service.py
index 6de8b22b73..d285df3570 100644
--- a/api/services/conversation_service.py
+++ b/api/services/conversation_service.py
@@ -145,7 +145,7 @@ class ConversationService:
         return conversation
 
     @classmethod
-    def get_conversation(cls, app_model: App, conversation_id: str, user: Optional[Union[Account, EndUser]],invoke_from: InvokeFrom =None):
+    def get_conversation(cls, app_model: App, conversation_id: str, user: Optional[Union[Account, EndUser]], invoke_from: InvokeFrom = None):
         if invoke_from and invoke_from == InvokeFrom.SERVICE_API:
             conversation = (
                 db.session.query(Conversation)