（A: Guest B: Receptionist）
A： Good afternoon, my room number is 321. Any mail for me？
B： Yes. You have two letters and one telegram, also a message was left by a lady before one hour.
A： Let me see who called…？I have to make a phone call.Will you get me the party？Here is the number.
B： OK. Wait for moment…Here is your party.
A： Thank you.I'll mail a letter to U.S.A. by airmail. How much do I have to pay for you？
B： A letter generally mall to America- Europe- Africa by airmail. First 20 grams is 20 yuan.Each additional 20grams is 15 yuan.
A： Oh, I see. Thank you very much.