text: Sara: i don't think I can make it tonite
  Sara: i still have so much work to do...
  Cathie: same here:/
  Cathie: I'm stuck at my desk
  Sara: what about Sat?
  Cathie: 9pm in the centre?
  Sara: sounds good;-)
  Cathie: ok, need to go back to work:/
  Sara: me2, bye!
target: Cathie and Sara are too busy with work to meet tonight. They will meet on Saturday at 9pm.