text: Thomson: Good morning Sheila, could we change the cleaning day next week pls? Thursday is not possible I'm afraid.
  Sheila: Good morning Ms. Thomson. So will it be either Wednesday or Friday?
  Thomson: Neither I'm afraid. How about Tuesday?
  Sheila: I can come only on Wednesday, Thursday or Friday. Sorry but I can't come on any other day.
  Thomson: In this case we have to cancel next week altogether I'm afraid.
  Sheila: If you say so.
  Thomson: But of course I'll pay you a small refund for your trouble.
  Sheila: You are very generous Ms. Thomson. Thank you!
  Thomson: So Sheila, see you on Thursday in two weeks.
  Sheila: Yes Ms. Thomson.
target: Thomson wants Sheila to come cleaning on a different day. Sheila can't come on Tuesday so Thomson has to cancel but will pay a small refund.