can i please book a train for friday ?
user
sure , what destination would you like ?
assistant
i am going to leicester .
user
where will you be leaving from ?
assistant
i will be leaving from ely no later then 17:00 .
user
i have a train that leaves at 16:21 . would you like a booking ?
assistant
yes please can you book me 1 seat on that train and let me know the reference number ?
user
actually , i believe some incorrect information was entered . i have not trains from ely to leicester on friday after 17:00 . let s verify what you are looking for .
assistant
sure , i am looking for a train going to leicester that departs from cambridge . it should leave after 10:30 on friday .