from llama_cpp import Llama
llm = Llama(model_path="path/to/model.gguf")

system_message = "You are a business consultant who gives data-driven answers."
user_message = "What are the key factors in a successful marketing strategy?"

message_list = [{"role": "system", "content": system_message},
               {"role": "user", "content": user_message}]


response = llm.create_chat_completion(messages = message_list)
print(response)

{'id': ..., 'object': ..., 'created': ..., 'model': ..., 'choices': [...], ...}