[{"role": "user", "content": "I need to express regret to someone in Italian, can you help me translate 'I warned you'?"}, {"role": "assistant", "content": "The correct translation of 'I warned you' in Italian is 'Io vi avevo avvisate'. This is a formal way to express regret, so if you want to use it with friends or in informal situations, you can use 'Ti avevo avvisato' (singular, informal) or 'Vi avevo avvisati' (plural, informal)."}]