Update input prompt to allow chat

app.py

@@ -25,9 +25,9 @@ As a derivate work of [Llama-2-7b-chat](https://huggingface.co/meta-llama/Llama-
 this demo is governed by the original [license](https://huggingface.co/spaces/huggingface-projects/llama-2-7b-chat/blob/main/LICENSE.txt) and [acceptable use policy](https://huggingface.co/spaces/huggingface-projects/llama-2-7b-chat/blob/main/USE_POLICY.md).
 """
 
-SYSTEM_PROMPT = ""
+SYSTEM_PROMPT = "Below is an instruction that describes a task. Write a response that appropriately completes the request."
 
-PROMPT_TEMPLATE = """Below is a chat history between a user and an AI assistant (you). The user gives instructions. Write a response that appropriately completes the latest request.\n\n{% for message in messages %}{% if message['role'] == 'user' %}{{ '\n### Instruction:\n' + message['content'] + '\n'}}{% elif message['role'] == 'assistant' %}{{ '\n### Response:\n' + message['content'] + '\n'}}{% endif %}{% endfor %}\n\n### Response:\n"""
+PROMPT_TEMPLATE = """{% if messages[0]['role'] == 'system' %}{{ messages[0]['content'] + '\n\n' }}{% endif %}### Instruction:\nWewe ni msaidizi wa AI unayepiga gumzo na mtumiaji.Hii ndiyo historia ya soga ya watu unaowasiliana nao kufikia sasa:\n\n{% for message in messages %}{% if message['role'] == 'user' %}{{ '\nUser: ' + message['content'] + '\n'}}{% elif message['role'] == 'assistant' %}{{ '\nAI: ' + message['content'] + '\n'}}{% endif %}{% endfor %}\n\nKama msaidizi wa AI, andika jibu lako linalofuata kwenye gumzo.\n\n### Response:\n"""
 
 if not torch.cuda.is_available():
     DESCRIPTION += "\n<p>Running on CPU 🥶 This demo does not work on CPU.</p>"
@@ -51,6 +51,7 @@ def generate(
     top_k: int = 50,
     repetition_penalty: float = 1.2,
 ) -> Iterator[str]:
+    print("chat history: ", chat_history)
     conversation = []
     if system_prompt:
         conversation.append({"role": "system", "content": system_prompt})