sunnyraintsk

A：Oh,excuse me,Mr.Li,I almost forgot there is a telephone message here for you. A doctor Green called and asked you to call him back.
B:Where is he now? Do you know?
A:He is staying in room 707 at the blackwood hotel.
B:Thank you very much. Do you have the telephone number of the hotel?
A:I'm sorry I don't, but you can get it, just dial 100.
B: Oh, could I trouble you to change a dollar?
A:All right. Here is the change. By the way, the public phones are over there on your right.
B:I see, thank you.