conversations.from: human
conversations.value: Bill is trying to figure out how many water bottles he needs to buy for his party.  He started out with 2 cases of water which have 24 bottles each. He has 70 guests that will be arriving, and he wants to have 2 bottles of water for each guest. How many additional bottles of water will he need to buy?
  Solve it.
conversations.from: assistant
conversations.value: Bill has 2 cases of 24 bottles each, so he has 24 * 2 = 48 bottles of water
  Bill needs enough water for 70 guests to have 2 bottles each, so he needs 70+70 = 140 bottles of water.
  Bill needs 140 bottles of water and has 48, so he needs to buy 140- 48 = 92 bottles of water.