i need a train out to london liverpool street on saturday .
user
what time do you need to leave on saturday ?
assistant
i would like to leave sometime after 16:15 , leaving from cambridge .
user
the first train after 16:15 tr8824 leaves at 17:59 . shall i book it for you ?
assistant
can you tell me how much that will cost and how long the journey is ?
user
yes , it will cost 13.28 pounds and take approximately 88 minutes . would you like me to book it for you ?
assistant
not at this time . thank you for everything !
user
sure . let me know if you need anything else .
assistant
okay . thank you .