refine llama-2 chat prompt

app_modules/llm_chat_chain.py

@@ -12,8 +12,11 @@ def get_llama_2_prompt_template():
     B_INST, E_INST = "[INST]", "[/INST]"
     B_SYS, E_SYS = "<<SYS>>\n", "\n<</SYS>>\n\n"
 
-    instruction = "Chat History:\n\n{chat_history} \n\nUser: {question}"
-    system_prompt = "You are a helpful assistant, you always only answer for the assistant then you stop. Read the chat history to get context"
+    instruction = "Chat History:\n\n{chat_history} \n\nUser: {question}\nAnswer in markdown:"
+    # system_prompt = "You are a helpful assistant, you always only answer for the assistant then you stop. Read the chat history to get context"
+    system_prompt = """\
+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.\n\nIf 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. \n\nDo not output any emotional expression. Read the chat history to get context.\
+"""
 
     SYSTEM_PROMPT = B_SYS + system_prompt + E_SYS
     prompt_template = B_INST + SYSTEM_PROMPT + instruction + E_INST