i am looking for a train departing from london liverpool please .
user
i'll be glad to help . you would like to from london liverpool street to what destination , please ?
assistant
cambridge . i would like to leave after 10:00 on friday .
user
i have 7 trains , could you tell me when you would like to arrive by ?
assistant
just any time after 10:00 , can i get the train id of 1 of them please ?