conversations.from: human
conversations.value: Donny has $78 in his piggy bank. If Donny buys a kite for $8 and a frisbee for $9. How much money does Donny have left?
conversations.from: assistant
conversations.value: Donny has 78 - 8 = 70 after paying for the kite.
  He has 70 - 9 = $61 left after buying the frisbee as well as the kite.