"My friend's dad, who is an academic professor, travels a lot for his job.
One day, when returning from a conference in Sydney, he was waiting in the business lounge. Suddenly, he spotted a familiar-looking man. He racks his brains trying to figure where he knows him from, and decides to go over to find out (it would be rude to ignore him).
Friend's dad: 'Hi, you look awfully familiar. Were you at the conference this week for International Trade Law?'
Man: 'Uh, no, I wasn't.'
Friend's dad: 'Oh, we have definitely met before though. I'm Professor *, from X University?'
Man: 'Um, I don't think we've met.'
Friend's dad: 'I definitely know you. Are you in law?'
Man: 'No, I'm not.'
Friend's dad: 'Well, I must have seen you at a conference somewhere. You're American, which university are you with? Or your colleagues, maybe you have a supervisor I might recognise the name of...?'
Man: 'I don't work at a university.'
Friend's dad: 'Well, what is your name at least?'
Man: 'Matt Damon.'"