i am looking for a train to ely on wednesday .
user
where are you leaving from ?
assistant
should depart from cambridge at 17:15
user
i can get you on a train leaving cambridge at 17:50 .
assistant
that will not work i need to arrive by 17:15 .
user
i have the tr1549 leaving at 17:50 and it will be arriving at 18:07 is that a little better for you ?
assistant
no that still will not work . is there anything earlier please ?