text: Dave: I need to go to the office ASAP
  Emily: What happened?
  Dave: I need to send off all the project files I have on my computer.
  Laura: Good luck with that
  Dave: is there still anyone in the office?
  Laura: When I was leaving Jess was still there
  Jess: I'm about to leave.
  Dave: Can you wait 5 min? I forgot my key.
  Jess: Yes, but no more than 5. I have an appointment soon
  Dave: Thanks Jess
  Emily: If you want to go home I can pop in, I'm just 2 minutes away
  Jess: It's ok, anyway I'm finishing off 
  Dave: I'll be there in a sec
target: Dave needs to come back to his office urgently to send all the project files he has on his computer. He forgot his key to the office. Jess is still in the office, but she needs to leave in 5 minutes. Emily can pop in if necessary because she is just 2 minutes away. 