Susan : David, would you like something to eat?
David : No, I'm full.
Susan : Do you want something to drink?
David : Yes, I'd like some coffee.
Susan : Sorry, I don't have any coffee.
David : That's OK. I'll have a glass of water.
Susan : A small glass, or a big one?
David : Small please.
Susan : Here you go.
David : Thanks.
Susan : You're welcome.