15%细节题。根据“I think I can give you an additional 15% discount…”可知正确答案。

M: Hello, I have a reservation for tonight.
W: Your name, please.
M: Nelson, Charles Nelson.
W: OK, Mr. Nelson. That’s a room for five and…
M: But excuse me, you mean a room for five pounds? I didn’t know the special was so good.
W: No, no, hold no—according to our records, a room for 5 guests was booked under your name.
M: No, no—hold on. You must have two guests under tile name.
W: OK, let me check this again. Oh, here we are.
M: Yeah?
W: Charles Nelson, a room for one for the 19th…
M: Wait, wait. It’s for tonight, not tomorrow night.
W: Em…I don’t think we have any rooms for tonight. There’s a conference going on in town and—er, let’s see…yeah, no rooms.
M: Oh, come on! You must have something, anything!
W: Well, let—let me check my computer here…Ah!
M: What? Oh, come on! You must have something, anything!
W: There has been a cancellation for this evening. A honeymoon suite is now available.
M: Great, I’ll take it.
W: But, I’ll have to charge you 150 pounds for the night.
M: What? I should have a discount for the inconvenience!
W: Well, the best I can give you is a 10% discount plus a ticket for a free continent breakfast.
M: Hey, isn’t the breakfast free anyway?
W: Well, only on weekends.
M: I want to talk to the manager.
W: Wait, wait, wait…Mr. Nelson, I think I can give you an additional 15% discount…