dialogue: #Person1#: Hello.
  #Person2#: Hello. May I speak to Mark, please?
  #Person1#: Sure, just a minute. Mark, you're wanted on the phone.
  #Person3#: Hello, this is Mark speaking.
  #Person2#: Hi! This is Jill. How come you didn't come in today?
  #Person3#: Oh, we had a birthday party for David last night. As a matter of fact I woke up with a terrible hangover.
  #Person2#: That's too bad. You'll have to be more careful nest time.
  #Person3#: Anything new at the office?
  #Person2#: No, nothing special. Oh, yes, you know Bill, The guy with the moustache. His wife had a baby girl last night and he passed out cigars to everyone today, He said his wife and daughter are doing fine. The baby is their first child.
  #Person3#: That's wonderful! We've got to celebrate!
  #Person2#: Yes, we have to. Do you think you can make it tomorrow?
  #Person3#: Sure. I ought to be ready for some more drinks by then. Thank you for calling.
  #Person2#: You're welcome. Bye.
summary: Mark didn't come in today because of a terrible hangover. Jill and he will celebrate the birth of Bill's new baby tomorrow.
topic: a phone call