text: Jack: I'm going swimming tomorrow at 4 p.m
  Jack: Anyone wanna join??
  Jacob: I want, but I can a bit later,
  Jack: When??
  Jacob: around 5 p.m, I guess
  Lucas: I have things to do
target: Jack is going swimming tomorrow at 4 p.m. Jacob can go around 5 p.m. Lucas is busy.