text: David: In two weeks we have the presentation.
  Ivy: Yes. We should start preparing it.
  Olympia: How about we meet today after school to talk about it
  David: Today I can't. I have my rehearsal.
  David: How about tomorrow?
  Ivy: Tomorrow I can't.
  Ivy: I'm visiting my grandma in the hospital.
  Olympia: Maybe it's best to meet on Saturday 
  David: Ok
  Ivy: Saturday morning is good for me too. 
  Olympia: You can come over to my place.
  Olympia: Since it's difficult to organise a meeting maybe we should do all the job then
  Ivy: Let's do it. 
target: David, Ivy and Olympia have the presentation in two weeks. They are meeting on Saturday morning at Olympia's to do all the presentation.