Excuse me, Miss.
Yes. May I help you?
I'm a graduate student here in mathematics. I've just come from China and I've never used a western library before. I'll be here for five years, so I'd like to learn to use the library as efficiently as possible. I wonder if someone might have time to show me around.
I'd be very glad to show you around, but I'm very busy right now. Could you come back about 3, 30?
Sure. 3:30 this afternoon.
Good. See you later.