i need help finding a train leaving cambridge after 20:45 .
user
many trains leave cambridge around 20:45 , what is the destination ?
assistant
i need to get to london liverpool street .
user
i have several options for you , and the price and exact departure time varies by day of the week . do you have a day preference ?
assistant
i would like to leave on thursday
user
train tr3695 leaves 21:59 and arrives on 23:27 . would you like to book it ?
assistant
thanks , that s all . goodbye .