text: Poppy: Hi Cris, you ok?
  Cris: Yep! Still studying for my Part 1 exams.
  Poppy: Have a rest now girl, it's gone midnight.
  Cris: You coming to Alex's 21st?
  Poppy: Bugger! I've got my cousin's 18th the same night. Oh well!
  Cris: Can't be helped. See you soon!
target: Cris is studying for exams after midnight. Poppy is planning to go to Alex's birthday party. Cris is going to her cousin's party instead.