text: Jim: gees I'm trying to call you up
  Jim: but it's busy
  Jim: then you call when I can't talk
  Jim: It's like a game of tag!
  Jane: sorry I know it's funny though
  Jane: I'll call you around 8? ok?
  Jim: fine!
target: Jim and Jane have been calling each other at moments when the other one couldn't talk. Jane will call Jim around 8.