i am looking for a train leaving on sunday going to cambridge .
user
where are you departing from ?
assistant
i want to depart from london liverpool street after 15:00 .
user
there is a train leaving on that date from london liverpool to cambridge at 15:39 , arrive at 17:07 with a price of 13.28 pounds . would you like to book ?
assistant
no , i will book it myself later . thanks , that s all i need .