generate response: I want to go to Cambridge, how much will that cost?. Intent: book_train. Slots: train-arriveby=09:30, 9:30, train-bookpeople=2, train-day=thursday, train-departure=london liverpool street, train-destination=cambridge
Response: There are three trains that will fit your needs, and the tickets are 16.60 pounds each. Would you like me to purchase tickets for you?