i am looking to book a train .
user
i would be more than happy to help you find a train . can you tell me where you will be departing from and where you would like to go ?
assistant
i am looking for a train that goes to leicester and arrives on sunday . the train needs to leave after 6:45 from cambridge .
user
is there a time you need to arrive by ?
assistant
i need to leave after 18:45 , not the time i said before .
user
i have 5 options for your requested time with the closest leaving at 19:21 . would you like to make a reservation ?
assistant
yes please . book it for 5 people . what is the reference number ?