Update app.py

app.py

@@ -27,26 +27,26 @@ class VietnameseChatbot:
 
     def get_response(self, user_query):
         try:
+            # Add a system message to guide the model's response
             payload = {
                 "model": "gemma2-9b-it",
                 "messages": [
+                    {
+                        "role": "system", 
+                        "content": "You are an assistant designed to have helpful, ethical, non-biased, and constructive conversations. Do not engage with political, sensitive, or inappropriate topics. If asked about such subjects, politely decline to discuss them and redirect the conversation to more positive, constructive topics."
+                    },
                     {"role": "user", "content": user_query}
                 ]
             }
-            
             response = requests.post(
-                self.api_url,
-                headers=self.headers,
-                json=payload
+                self.api_url, headers=self.headers, json=payload
             )
-            
             if response.status_code == 200:
                 return response.json()['choices'][0]['message']['content']
             else:
                 print(f"API Error: {response.status_code}")
                 print(f"Response: {response.text}")
                 return "Đã xảy ra lỗi khi kết nối với API. Xin vui lòng thử lại."
-                
         except Exception as e:
             print(f"Response generation error: {e}")
             return "Đã xảy ra lỗi. Xin vui lòng thử lại."