conversations.from: human
conversations.value: Break down this math problem: John needs to replace his shoes so he decides to buy a $150 pair of Nikes and a $120 pair of work boots.  Tax is 10%.  How much did he pay for everything?
conversations.from: assistant
conversations.value: The shoes cost $150 + $120 = $270
  The tax was $270 * .1 = $27
  So the total cost was $270 + $27 = $297