Update app.py

app.py

@@ -8,7 +8,7 @@ def respond(message, history):
     if history:
         messages.extend(history) 
 
-    messages.append({"role":,"user","content": message})
+    messages.append({"role": "user", "content": message})
     response = client.chat_completion(
     messages,
     max_tokens=100