generate response: Please book it for 3 people for 2 nights starting Sunday.. Intent: book_train. Slots: hotel-area=south, hotel-bookday=sunday, hotel-bookpeople=3, hotel-bookstay=2, hotel-name=aylesbray lodge guest house, hotel-stars=4, train-arriveby=10:00, train-bookpeople=3, train-day=sunday, train-departure=broxbourne, train-destination=cambridge
Response: Booking was successful. Reference number is : L4WMNV6Q .