text: Ellie: Hi, Dad, can you buy milk and potatoes on your way back?
  George: OK, but I'll be late, I'm still at the office.
  Ellie: No prob, it's not that urgent, it's just that I'm waiting for a package and I can't leave the house until it comes.
  George: Are you going to spend all your pocket money on clothes?
  Ellie: I ordered books, Dad. BOOKS. I need them for school :P
target: Ellie has ordered some books for school and she has to be at home waiting for the parcel. Dad will be late. He will buy some milk and potatoes.