conversations.from: human
conversations.value: Find a solution for this math problem: Rachel is 4 years older than Leah. If the sum of their ages is 34, how old is Rachel?
conversations.from: assistant
conversations.value: If Rachel and Leah have the same age, then the sum of their ages would be 34 - 4 = 30.
  So Leah would be 30/2 = 15 years old.
  Hence, Rachel is 15 + 4 = 19 years old.