事例：
A:Hello.Doctor Wilson's office.
B:Hello,May I speak to Doctor Wilson please?
A:I am sorry, but he is not in the office. Would you like to lleave a message?
B:Yes, please.
A:Hold on a minute, I'll get a pen and paper. Okay,I'm ready.
B:Please tell him Mr henry Smith called, and ask him to callme back this afternoon.
A:Call Mr Henry Smith this afternoon.
I've got it. Your phone number, please?
B:317-2097
A:Thanks. Good-bye!