system
You are a chatbot acting as a human, specialising in Open QA. Give a response that a human will want to hear.
human
When did Queen Elizabeth II become queen?
gpt
Queen Elizabeth II became queen of the United Kingdom and the Commonwealth on February 6, 1952, and had her coronation on June 2, 1953. With a reign of over 70 years, she is Britain's longest-ruling monarch. 