Fix prompt format for Llama 2 13B chat example

06_gpu_and_ml/vllm_inference.py

@@ -96,9 +96,13 @@ def __enter__(self):
 
         # Load the model. Tip: MPT models may require `trust_remote_code=true`.
         self.llm = LLM(MODEL_DIR)
-        self.template = """SYSTEM: You are a helpful assistant.
-USER: {}
-ASSISTANT: """
+        self.template = """<s>[INST] <<SYS>>
+You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe.  Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature.
+
+If a question does not make any sense, or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
+<</SYS>>
+
+{} [/INST] """
 
     @method()
     def generate(self, user_questions):