i need to catch a train out of bishops stortford , to arrive by 20:45 .
user
there are many trains . where is your destination ? what day would you like to travel ?
assistant
cambridge on saturday .
user
i have the tr7734 leaving at 19:29 and arriving at 20:07 . would you like me to book that for you ?
assistant
sounds perfect , but i do not need it booked just yet . what s the price on that ?