FIX: Use "assistant" role instead of "system"

app.py

@@ -73,7 +73,7 @@ def bot_respond(user_query, chat_messages: list):
 
     chat_messages.pop()
     chat_messages.append({"role": "user", "content": user_query})
-    chat_messages.append({"role": "system", "content": text})
+    chat_messages.append({"role": "assistant", "content": text})
 
     return text, context_prompt