hi , i am heading to birmingham new street so please find me a train that leaves on friday
user
are you leaving from cambridge ? is there a time you would like to leave ?
assistant
yes , i am leaving from cambridge . departure time does not matter , but i need to arrive by 18:15 .
user
there are 12 trains available for you and the first 1 leaves at 05:01 . can i book a seat for you or do you prefer a later departure time ?
assistant
no , i said arrive by 18:15 . try again .
user
the closest arrival to 18:15 is 17:44 . would that work for you ?
assistant
what is the price for a ticket ?