text: Mark: I've got a weekend off
  Mark: A miracle! ;)
  Julie: :)
  Mark: Let's go to the botanics if the weather is okay
  Jo: Good idea!
  Jo: There is a nice path from your place
  Jo: 25 mins walk
  Julie: The one with the colourful playground?
  Jo: Yeah
  Mark: Saturday afternoon? 
  Julie: works for me
  Julie: Jo?
  Jo: I'm not 100% at the moment 
  Jo: Will give you a call later
target: Mark has a weekend off so wants to go to the botanics. Mark and Julie agree on Saturday afternoon. Jo isn't sure at the moment and will give Julie a call later.