Fix : Handle empty list error with a default response

app.py

@@ -27,7 +27,12 @@ if user_input := st.chat_input("What is up?"):
     bot_reply = response.json()
 
     # Extract assistant response
-    assistant_response = bot_reply[0]["text"]
+    if bot_reply !=[]:
+        assistant_response = bot_reply[0]["text"]
+    # Handle empty api responses
+    else:
+        assistant_response = 'API request returned with an empty list []. Please continue with a different question'
+
 
     # Display assistant response in chat message container
     with st.chat_message("assistant"):