generate response: Okay please book a table for five people on tuesday at 18:00 and give me the reference number. Intent: find_train. Slots: restaurant-area=dontcare, restaurant-bookday=tuesday, restaurant-bookpeople=5, restaurant-booktime=18:00, restaurant-food=japanese, restaurant-name=wagamama, train-arriveby=15:45, train-day=tuesday, train-departure=london kings cross, train-destination=cambridge
Response: I am unable to book it at this time.