text: Kate: Ali are you in Berlin already?
  Ali: I think you have an unexpected guest
  Kate: Unexpected but nice :)
  Ali: I just arrived in Berlin
  Simon: You are always welcome
  Ali: I am going to take train to airport and wait there
  Simon: I'm still at work :(
  Kate: Me too
  Ali: No problem at all. Im just saying hi
  Kate: I'll pick you up around 9pm and we will go to have sushi. Is it ok for you? Or do you prefer to eat at home?
  Simon: Kate I'll be ready at 8;15
  Ali: Anything is excellent for me
target: Ali has just arrived in Berlin, but Simon and Kate are still at work, so they will pick him up later.