conversations.from: human
conversations.value: I need help with this problem:
  Lucy has $65 in the bank. She made a $15 deposit and then followed by a $4 withdrawal. What is Lucy's bank balance?
conversations.from: assistant
conversations.value: Lucy had $65 + $15 = $80 after making a deposit.
  So, her bank balance is $80 - $4 = $76 after making a withdrawal.