conversations.from: human
conversations.value: Jack has 65 pounds of sugar today. Tomorrow he will use 18 pounds of sugar and the following day he will buy 50 more pounds of sugar. How many pounds will he have in the end?
conversations.from: assistant
conversations.value: Jack will have 65-18 = 47 pounds of sugar tomorrow.
  Jack will have 47+50 = 97 pounds of sugar the following day.