[{"role": "user", "content": "I'm writing a letter to my Italian friend about a great dancer I've seen, and I want to describe the experience to them - how would I translate the sentence 'I've seen you dance' into Italian?"}, {"role": "assistant", "content": "The translation of 'I've seen you dance' into Italian is 'Vi ho viste danzare.' This sentence is in the formal 'you' form, which is suitable for writing a letter to a friend. If you were speaking to someone you're familiar with, you might use the informal 'you' form, but 'Vi ho viste danzare' is a good choice for a letter."}]