Update app.py

app.py

@@ -293,16 +293,16 @@ knowledge base to show how retrieval-based self-service can work.
 """
 
 chat = gr.ChatInterface(
-    fn=chat_respond,
+    role="assistant",
     title="Self-Service KB Assistant",
     description=description,
-    type="messages",  # use new-style message format
+    type="messages", 
     examples=[
         "What makes a good knowledge base article?",
         "How could a KB assistant help agents?",
         "Why is self-service important for customer support?",
     ],
-    cache_examples=False,  # avoid example pre-caching issues on HF Spaces
+    cache_examples=False,
 )