generate response: I'd like to leave Sunday, and it doesn't matter when I arrive.. Intent: book_train. Slots: train-arriveby=dontcare, train-bookpeople=7, train-day=sunday, train-departure=stevenage, train-destination=cambridge, train-leaveat=11:00
Response: There is a train from Stevenage to Cambridge Sunday at 11:54, it arrives at 12:43 costing 10.24 GBP per ticket. Would you like me to book this train?