text: Anna: Hi, so Thursday or Friday this week, instead of Saturday.
  Anna: Can you come on Thursday at 18:00?
  Belinda: Hi!
  Belinda: Yes, that's perfect! 
  Anna: Great. See you then!
  Anna: Are you coming? Is everything okey?
  Anna: I hope you're fine. 
  Belinda: Sorry Anna, got stuck on the train in the middle of nowhere... 
  Belinda: No internet, no network :/
  Belinda: I'm coming back from Prague. We're 10 hours behind schedule..
  Anna: Sorry to hear that. Glad you're okey!
  Anna: I though you were coming back on Wednesday. 
  Anna: I'll meet you next week then?
  Belinda: Yes, please. If it's possible, I'd like to meet on Monday.
  Anna: I don't work on Mondays, but we can meet on Tuesday.
  Belinda: Taht would be great, thx!
target: Belinda can no longer meet on Thursday as she is delayed on her way back from Prague. She rescheduled with Anna for Tuesday next week. 