generate response: No, the arrival time does not matter. I need to book 4 tickets.. Intent: book_train. Slots: train-arriveby=dontcare, train-bookpeople=4, train-departure=cambridge, train-destination=leicester, train-leaveat=20:15
Response: Alright, I booked you 4 tickets on TR5159, leaving Cambridge at 20:21 and arriving in Leicester at 22:06 on Friday. Your reference number is VKVT7CTT .