请问能否新增角色设定的提示词

例如，我想要给CHATGPT一个身份设定：以一个老师的身份，温馨亲切的口气回答问题。

在openai的文档里，可以在"role": "system", "content":中设置。

但是看了大神您的动作，不知道该怎么设置呢。或者能否告知该如何设置？或者辛苦添加一个身份设定的选项？

openai.ChatCompletion.create(
  model="gpt-3.5-turbo",
  messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Who won the world series in 2020?"},
        {"role": "assistant", "content": "The Los Angeles Dodgers won the World Series in 2020."},
        {"role": "user", "content": "Where was it played?"}
    ]
)