Update app.py

app.py

@@ -16,10 +16,10 @@ def respond(message, history):
     ]
 
     if history:
-    messages.extend(history)
+        messages.extend(history)
 
     response = client.chat_completion(
-    messages, max_tokens = 100
+        messages, max_tokens = 100
     )
 
     return response['choices'][0]['message']['content'].strip