conversations.from: human
conversations.value: In 10 years, Melanie will be 18 years old. In how many years will her age be thrice her present age?
conversations.from: assistant
conversations.value: Melanie's present age is 18 - 10 = 8.
  Thrice Melanie's present age is 8 x 3 = 24.
  So, she will be thrice her present age in 24 - 8 = 16 years.