conversations.from: human
conversations.value: Abigail thinks she has some lost some money out of her purse. She had $11 in her purse at the start of the day, and she spent $2 in a store. If she now has $3 left, how much money has she lost?
conversations.from: assistant
conversations.value: After going shopping, Abigail had 11 – 2 = 9 dollars left.
  This means she lost 9 – 3 = 6 dollars.