conversations.from: human
conversations.value: Benjie is five years older than Margo. If Benjie is 6 years old, how old will Margo be in three years?
  Solve this problem.
conversations.from: assistant
conversations.value: Margo is 6 - 5 = 1 year old now.
  So, Margo will be 1 + 3 = 4 years old in three years.