[{"role": "user", "content": "I'm trying to express my disappointment with someone in Italian, can you please help me translate the sentence 'He's a big liar'?"}, {"role": "assistant", "content": "The translation of the sentence 'He's a big liar' in Italian is 'Lui \u00e8 un grande bugiardo'. However, a more common way to express this in Italian would be 'Lui \u00e8 un bugiardo' or simply '\u00c8 un gran bugiardo', but if you want to emphasize that he's a big liar, you can use 'Lui \u00e8 un grande bugiardo'."}]