I was on a red eye flight from EZE via MEX to the US. I was in the Biz cabin. The FAs were doing dinner service. When it was my turn, she stared at me and asked - "What do you want?" - I thought I heard her wrong so, I said, "excuse me"? She then repeated again - "What do you want?"...At this point, I thought to myself, either her English is bad or she's just having a bad day. So, I declined dinner and went to sleep.