i am looking for a train departing ely and should arrive by 16:45 .
user
i can help with that ! there are a total of 42 trains departing from ely . what is your destination so i can narrow this down for you ?
assistant
i would like to go to cambridge on thursday
user
what time you like to leave ?
assistant
it does not matter what time i leave as long as i am there by 16:45 .