could you help me find a train ? i am looking for 1 to take me to cambridge and i need it to leave by 17:45 on saturday .
user
where are you departing from ?
assistant
i am leaving from cambridge heading to norwich please .
user
tr7043 departs cambridge at 18:36 on saturday , arriving in norwich at 19:55 . would you like a ticket on this train ?
assistant
yes , that would be fine .
user
would you just need 1 ticket or how many can i book for you ?
assistant
i need to book the train for 4 people , and i'll need the reference number , please .