text: Mark: Cracow?
  Lucy: No, Warsaw
  Lucy: why?
  Mark: I will be 2morrow in Cracow and then we're going to the mountains :D
  Lucy: which mountains?
  Mark: Tatras..
  Lucy: really? 
  Lucy: bastard, why didn't u tell me before?
  Mark: it's a last minute choice.
  Mark: but we still have a place in the car:D
  Lucy: how long u wanna stay there?
  Mark: till Monday
  Lucy: hmm....
  Lucy: what time are u leaving?
  Mark: 2morrow aftrer work, around 5, I guess.
  Lucy: so u want to sleep in Cracow?
  Mark: probably yes.
  Mark: still not sure..
  Lucy: how many pple?
  Mark: 4 or 5 if u're coming ^^
  Lucy: Yes, I'm in! 
  Lucy: and we can sleep at my place ;-)
  Mark: perfect, thx!
  Mark: I'll add you to the group where we discuss the details
  Lucy: thx.
target: Mark invites Lucy to join him and 3 other people for a trip to Tatra Mountains. The group is going by car on Friday afternoon. They will probably spend Friday night in Cracow and then head off to the mountains. They will come back on Monday.