generate response: Sorry. I really need to be leaving from Cambridge to go to Broxbourne, leaving after 17:45 on Thursday. Arrival time doesn't matter.. Intent: book_train. Slots: train-bookpeople=3, train-day=thursday, train-departure=cambridge, train-destination=broxbourne, train-leaveat=17:45
Response: How about TR9890? It departs Cambridge at 18:01 and arrives in Broxbourne at 19:01. It is 17.90 pounds per ticket. Would you like to book that one?