i need to find a train going to londons kings cross that would arrive by 17:15
user
i have 21 trains that match your request . where will you be departing from ?
assistant
leaving cambridge this coming sunday .
user
i am sorry , we do not have any trains arriving by 17:15 . the earliest train will arrive at london kings cross at 19:51 . do you need anything else ?
assistant
no thanks . go ahead and book the train for 4 people and please provide the reference number .
user
your booking was successful , the total fee is 75.52 gbp payable at the station . your reference number is : ums71sr7 . your train will leave at 19:00 .
assistant
thank you . i also need to find a place to stay .