answer: Peter asks Janet about a birthday present for Janet's daughter. Then they talk the date of their birthday and Mark's birthday.
documents: #Person1#: Hello, Janet.
  #Person2#: Good morning, Pete.
  #Person1#: And what is this?
  #Person2#: Ah, this is my daughter's birthday present. Her birthday is next week.
  #Person1#: And when is your son's birthday?
  #Person2#: That is not for a while. His birthday is only in August.
  #Person1#: But Mark's birthday is in April so I need to think about his present soon.
  #Person2#: And when is your birthday?
  #Person1#: Oh, my birthday is in December just before Xmas so of course nobody remembers.
  #Person2#: My birthday is in June, when we are always on holiday. So my family often forgets my birthday too.