on saturday i need a train that will arrive by 21:45 .
user
can you tell me where you will be departing from and heading to ?
assistant
i will be leaving from ely and going to london .
user
would that be london liverpool or london kings cross ?
assistant
either 1 is fine with me .
user
are you sure you do not have a preference ?
assistant
yes i am sure . i need to book that for 5 people .
user
we do not have any trains going from ely to london liverpool or london kings cross . do you need anything else ?
assistant
i want a train departing from cambridge , going to ely . saturday , arrival by 21:45 .
user
the tr7349 train arrives at ely at 20:07 . would you like to book it or more information ?
assistant
that s a good time . please book tr7349 for 5 people , please .