Update app.py

app.py

@@ -53,7 +53,7 @@ def postprocess_message_text(api_response):
         str: Formatted message content.
     """    
     # Convert api_response to dictionary
-    response_dict = response.model_dump()
+    response_dict = api_response.model_dump()
     
     # Extract the content from the choices
     message_content = response_dict["choices"][0]["message"]["content"]