text: Olivier: Yo , how are U?
  Pierre: yes and U?
  Olivier: ok
  Pierre: new number?
  Olivier: yep
  Pierre: ready for a skype this week end?
  Olivier: I can't. I 'll go away with my parents
  Pierre: no problem. Ciao
target: Olivier is leaving with his parents this weekend, so he can't skype with Pierre.