dialogue a
（a car pulls up in front of huatian hotel and a doorman（a）goes forward to meet the guests b and c, opening the door of the car for them.）
a： good evening, sir and madam. welcome to our hotel.
mr bell （b）: thanks. good evening.
a： （opening the trunk, taking out the baggage and looking at the name on the baggage tags.）i'm the doorman, sir. so you have got altogether four pieces of baggage？
b： er. maybe five, margaret（c）？
a： five？ oh, sorry. let me have a check again.
c：oh, no, henry. always poor memory! we've got only four.
b： i see.
（to the doorman） sorry, boy. you're right. four pieces.
a： never mind, sir. the reception desk is straight ahead. after you, please.
b： yes, thank you.