[{"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": "In Italian, you can express frustration with someone's behavior by saying 'Lei \u00e8 immaturo.' However, please note that 'immature' is typically used to describe someone who is younger or not yet fully developed. If you're looking to describe someone as acting childish or immature in their behavior, you might want to consider using a different phrase."}]