conversations.from: human
conversations.value: Daniel buys a magazine costing $0.85 and a pencil costing $0.50. He pays with a coupon that gives him $0.35 off. How much does he spend?
conversations.from: assistant
conversations.value: Daniel buys both magazine and pencil for $0.85 + $0.50 = $1.35.
  The coupon gives him a total cost of $1.35 - $0.35 = $1.