Domains: train

user: On Saturday I need a train that will arrive by 21:45.

assistant: Can you tell me where you will be departing from and heading to?

user: I will be leaving from Ely and going to london.

assistant: Would that be London Liverpool or London Kings Cross?

user: Either one is fine with me.

assistant: Are you sure you don't have a preference?

user: Yes I'm sure. I need to book that for 5 people.

assistant: We don't have any trains going from Ely to London Liverpool or London Kings Cross. Do you need anything else?