Waiter: Here is your fish with potatoes, madam.
Customer: Excuse me, I didn't order fish. I ordered the vegetable pasta.
Waiter: Oh? I wrote "fish" on my notepad. Maybe I made a mistake.
Customer: It's OK. But I am allergic to fish. I can't eat this.
Waiter: I am so sorry. Let me take it back. I will tell the kitchen now.
Customer: How long will the pasta take?
Waiter: About fifteen minutes. In the meantime, here is a free soup.
Customer: That's kind, thank you. I'm very hungry.
Waiter: And the pasta is free today. Again, I'm very sorry.
Customer: Thank you. Everybody makes mistakes.
Fiction note: All people, places and events in this dialogue are fictional.