How can I help you, miss?
Could you break a $20 bill for me?
Sure, how do you want it?
Could I have some fives and the rest in ones?
Well, I have 2 fives, but I don't have enough ones. Are quarters fine with you?
Oh, that's even better. In that case, I won't have to worry about the small change for the bus later.
Here you go.
Thanks a million.