[{"role": "user", "content": "I'm trying to express regret for not meeting my own expectations, could you help me translate the sentence 'I didn't do my best' into Italian?"}, {"role": "assistant", "content": "The translation of 'I didn't do my best' into Italian is 'Io non ho fatto del mio meglio.' This sentence perfectly conveys the feeling of regret for not meeting your own expectations."}]