[{"role": "user", "content": "I'm trying to learn Italian and I'm stuck on the sentence 'I called Tom'. Can you help me translate it?"}, {"role": "assistant", "content": "Certo! The translation of 'I called Tom' in Italian is 'Io ho chiamato Tom'. However, in informal contexts the more common translation would be 'Ho chiamato Tom'."}, {"role": "user", "content": "Why 'Io ho chiamato Tom' and 'Ho chiamato Tom'?"}, {"role": "assistant", "content": "In Italian, 'Io' is the formal subject pronoun for 'I', but it's often omitted in informal contexts. So, 'Io ho chiamato Tom' is a more formal way of saying it, while 'Ho chiamato Tom' is more informal and commonly used in everyday conversations."}]