text: Anna: is anyone going to pick Mark from the airport?
  Marcus: i could but when and where from?
  Anna: Sydney, Thursday at 3
  Marcus: am or pm? :D
  Leslie: haha fortunately pm:D
  Marcus: hmm i have a meeting at 1. I don't think i can make it
  Leslie: well i guess it will take him some time after landing, reclaiming luggage etc
  Anna: yeah I reckon it's fine if you're there at 4
  Marcus: oh well ok then
  Leslie: great
  Anna: ok I'll call him and give him your number
  Marcus: ok
  Anna: ok done
  Marcus: ok
target: Marcus will pick Mark from the airport at 4pm. Anna will call Mark and give him Marcus' number.