conversations.from: human
conversations.value: Gabriel wants to buy a car for $10000 and a phone for $800. Gabriel has $5000 from working on weekends and his brother gave him $200 to help him. How much money does he still need?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: The amount of purchases Gabriel wants to make is $10000 + $800 = $10800.
  And Gabriel has $5000 + $200 = $5200.
  So, Gabriel still needs $10800 - $5200 = $5600.