are there any trains leaving after 17:15 that go to the stansted airport ? yes , as long as its leaving cambridge on friday . . . thank you
i have a train leaving cambridge at 17:40 and arriving at the airport at 18:08 . can i book that for you ?
{'service': 'train', 'act': 'request', 'slot_name': 'people', 'value': '?'}
how many tickets would you like ?