text: Jane: Rick, I have a medical appointment on the 7th, could you watch Jess for me?
  Rick: At what time and for how long?
  Jane: I need to leave home around 1PM, it's close so it shouldn't take more than 2-2,5 hours.
  Rick: Ok, that should work, just remember that I would need to leave at 4PM at latest as I have an event to attend in the evening.
  Jane: Great, thanks!
target: Jane sees a doctor on the 7th at 1 pm. Rick agrees to take care for Jess untill 4 pm.