[解析]
ACBB
M:Good morning,I'm Charles Nelson.I have a reservation for tonight at the hotel.I need to check in now.
W:Good morning.Nelson.You have booked a room for five,right?
M:No,no.There must be a mistake.Can you check it,please?
W:Okay.Let me check it.Here,Mr Charles C.Nelson for tonight.
M:Ah,my name is Charles Nelson,not Charles C.Nelson.
W:I'm sorry.Let me check this again.Oh,yes.Charles Nelson,a room for one for the 19th of May.
M:No,a room for tonight,not for tomorrow evening.
W:I'm really sorry,but I don't think we have any rooms for tonight.Well,let me check my computer here.Ah!There has been a cancellation for this evening.A bigger room is now available.But it is a little expensive.Can you accept a higher price?
M:Yes,I'll take it.How much is it?
W:The room is usually 250 dollars a night.Well,what I can give you is a 10% discount on your room plus a ticket for a free breakfast.
M:Thank you very much!