generate response: On thursday I need to book it for 3 people.. Intent: book_train. Slots: train-bookpeople=3, train-day=thursday, train-departure=stansted airport, train-leaveat=10:30
Response: Alright, I have booked you 3 tickets for the TR7920 train, leaving Stansted Airport at 11:24. Your reference number is VKBYCLSB .