conversations.from: human
conversations.value: This math problem has got me stumped: Melinda is taking a 1200-mile trip with her family to visit their cousins. How much time will they save if they drive 60 miles an hour instead of 50 miles an hour?
  Can you show me the way?
conversations.from: assistant
conversations.value: Going 60 mph, the trip would take 1200-mile trip / 60 miles an hour = 20 hours.
  Going 50 mph, the trip would take 1200-mile trip / 50 miles an hour = 24 hours.
  Melinda’s family would save 24 – 20 = 4 hours.