i would like to book a train . after 19:00 on friday from leicester to cambridge . yes , i think the 20:54 arrival time should work . 1 ticket please .
ok , let s narrow this down a bit . where are you traveling to , what day are you traveling , and at what time ? okay great , there are 5 trains leaving after 19:00 . the earliest being 19:09 and arriving by 20:54 . would that work for you ? how many tickets do you want for this tr4365 train ?
{'service': 'train', 'act': 'offerbooked', 'slot_name': 'ref', 'value': '231k9boe'}
ok . you are booked . your reference number is 231k9boe .