conversations.from: human
conversations.value: Patrick has been saving money to buy a bicycle that costs $150. He saved half the price but he then lent $50 to his friend. How much money does Patrick have now?
  Solve this problem.
conversations.from: assistant
conversations.value: Half of the price of the bicycle is 150 / 2 = $75.
  The money that Patrick has now is 75 – 50 = $25.