hi , i need a train leaving cambridge after 14:30 . excellent . can you assist me in booking a ticket ? wait . . i did not specify how many people . can i cancel kpfta841 ?
there is a train leaving cambridge for birmingham new street on friday at 15:01 for 75.10 pounds . the trip will take 163 minutes . certainly . your reference number is kpfta841 .
{'service': 'train', 'act': 'request', 'slot_name': 'people', 'value': '?'}
sure , how many tickets do you want ?