conversations.from: human
conversations.value: This math problem has got me stumped: John adopts a dog.  He takes the dog to the groomer, which costs $100.  The groomer offers him a 30% discount for being a new customer.  How much does the grooming cost?
  Can you show me the way?
conversations.from: assistant
conversations.value: The groomer gave a 100*.3=$30 discount
  So the grooming cost 100-30=$70