[{"role": "user", "content": "I want to understand how to express frustration with someone's behavior in Italian. How do I say 'You're immature' in Italian?."}, {"role": "assistant", "content": "The correct translation of 'You're immature' in Italian is 'Siete immature.'. This phrase can be used to express frustration with someone's behavior, implying that they are not acting in a mature or responsible way."}]