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.