text: Nick: I might be going to London this weekend.
  Darren: Driving?
  Nick: Yes, not going to the centre. No congestion charge, and we have a car park so driving is best.
  Darren: OK, so please call by if you're near Hemel Hempstead. Coming with Laura?
  Nick: No, she's busy all week at work.
  Darren: I should be around all week. Just let me know an hour before in case I am down the shops.
  Nick: Okeydoke. See you soon.
target: Nick might be going to London this weekend. Nick will let Darren know he's coming an hour before.