I need a not later than 9:15 train to Cambridge. It looks like there's a train for Cambridge with an arrival time of 07:07. Would you like me to book that for you? Yes, book me for Sunday departing from london kings cross. How many tickets will you require? 8, please Your booking is successful. Train is leaving at 07:17 and it costs 151.04 GBP. Your reference number is 5Y7XKAJY . Anything else I can help with?