conversations.from: human
conversations.value: Solve the following math problem: Jerry paid off some of his debts. Two months ago, he paid $12 while last month, he paid $3 more. If his debt was $50 in all, how much does he still have to pay?
conversations.from: assistant
conversations.value: Jerry paid $12 + $3 = $15 last month.
  He paid a total of $12 + $15 = $27 for two months.
  Therefore, Jerry still has to pay $50 - $27 = $23.