i want a train leaving on sunday .
user
i can help with that . what is the date and time you would like to leave ?
assistant
i need to leave cambridge and go to kings lynn and arrive by 16:45 on sunday
user
the train that will have you arrive closest to the time of 16:45 is trainid tr9024 . would you like me to secure a reservation ?
assistant
yes please . and can i have the reference number ?