generate response: Hm, there really isn't anything leaving after 08:30? All day?. Intent: book_train. Slots: train-bookpeople=7, train-day=monday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=08:30
Response: I'm sorry for the confusion, there are actually 16 trains to choose from. They depart every hour beginning at 08:40 through 23:40. Do you prefer an early departure time?