Chen is in America. His American friend, Daisy, suggested having lunch with him at a restaurant.
C: Why's that waiter so angry?
D: Those people who just left didn't seem to give him any tip, which made him angry.
C: Is that absolutely necessary here?
D: Kind of. It's the custom. You can't really avoid leaving at least a small tip.
C: But suppose the service is bad?
D: In that case, of course, we don't leave one.
C: And does the waiter know that's why you didn't give him a tip?
D: Exactly. It's just like telling him off.
C: No wonder he's so angry.
D: Well, in fact, the people did leave him a tip, but that kid over there took it.

We tipped the waiter with a lot of money, beacause his service was so good.
I tipped the waiter ten dollars for his excent service.
give sb money as a tip for sth  不说：I give sb ten dollars tip  而说：give sb ten-dollar tip
daisy 小黄花         petal 花瓣
I am sorry sir, after I sever them, I come back to wait on you.  或用: server you
口语: be angry at/with 混用
The rude bus-driver lost his temper with the old woman.
tell sb off = scold sb
mischievous = naughty  顽皮的