generate response: I am arriving on Friday.. Intent: book_train. Slots: hotel-area=north, hotel-bookday=friday, hotel-bookpeople=5, hotel-name=lovell lodge, hotel-parking=dontcare, hotel-pricerange=dontcare, hotel-stars=2, hotel-type=hotel, train-arriveby=18:00, train-bookpeople=5, train-day=friday, train-departure=cambridge, train-destination=ely
Response: how many days will you stay?