Update app.py

app.py

@@ -142,7 +142,7 @@ def merlin_chat(message, history):
     prompt_data = history
     prompt_data.append(user_msg)
     prompt_data.insert(0,system_msg)
-    prompt = json.dumps(system_msg)[:-1] + ",{'role': 'assistant', 'content': '"
+    prompt = json.dumps(system_msg)[:-1] + ",{\"role\": \"assistant\", \"content\": \""
     for attempt in range(3):
         # result = model(prompt, max_new_tokens=250, return_full_text=False, handle_long_generation="hole")
         result = generate_text(prompt, model_path, parameters, headers)