generate response: Can you search for one that is cheap in price then?. Intent: find_train. Slots: hotel-bookday=saturday, hotel-bookpeople=8, hotel-bookstay=5, hotel-pricerange=cheap, hotel-stars=2, hotel-type=dontcare, train-day=thursday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=09:45
Response: Nothing is rated 2 stars in any part of the city, what specifically would you like?