[{"role": "user", "content": "I'm trying to learn some key phrases in Italian, including idioms. I'd appreciate it if you could help me with the translation of 'Stop whining.'"}, {"role": "assistant", "content": "The translation of 'Stop whining' in Italian is 'La smetta di lamentarsi.' This is a common idiomatic expression used to tell someone to stop complaining or whining about something."}, {"role": "user", "content": "That's really helpful, thank you! Can you also tell me when I would use this phrase? Is it formal or informal?"}, {"role": "assistant", "content": "'La smetta di lamentarsi' is an informal expression. You would typically use it with friends or family members who are complaining or whining excessively. If you want to use a more formal version, you could say 'Per favore, smetta di lamentarsi.'"}]