text: Lucas: Howard and Nancy are coming to visit me on Saturday
  Lucas: how about you John? Wanna join us?
  John: this Saturday?
  Lucas: that's right, in the afternoon.
  John: damnit. I want but I can't...
  Lucas: Come on, why?
  John: this Saturday I'm working until 5 p.m. and then I have an appointment at the dentist's
  Lucas: oh my... looks like a busy and unpleasant time...
  Lucas: I'm sorry for you, John
  John: there certainly are things in life you cannot skip
  John: but thanks a lot Luc, I appreciate that you invited me anyway :)
  Lucas: no problem, you're my friend, bro :)
  Lucas: hope you won't suffer too much at the dentist's
  John: thanks!
  John: don't worry, he's a real professional, I trust him
  Lucas: good for you
  John: yeah. Have fun on Saturday and say hello for me, please. Bye
  Lucas: Thanks, I will! Bye
target: Howard and Nancy are visiting Lucas on Saturday, but John can't join because of work.