hi there . i need to book a train from cambridge to broxbourne .
user
is there a day you need to leave ? do you have a time you need to leave or arrive ?
assistant
i am sorry , i actually need to travel from broxbourne to cambridge . and yes , i actually do need to leave after 13:00 on tuesday .
user
all right , the tr8199 train leaves at 13:32 on tuesday . would you like me to purchase tickets for you ?
assistant
yes , that would be great . i need 8 seats .