would you help me book a train for thursday , please ?
user
yes , where would you like to go to ?
assistant
i would like to go to cambridge
user
there are over 200 trains going to cambridge on thursday . where will you be departing from ?
assistant
i will be leaving from kings lynn .
user
that narrows us down to about 19 trains . do you have a time you would like to leave after or arrive by ?
assistant
i would like to leave after 15:45 .