i need a train from cambridge to norwich please .
user
what day will you be travelling ?
assistant
i would like to depart on sunday .
user
we have 19 trains that go from cambridge to norwich on sunday . would you like to depart at a certain time ?
assistant
i need to arrive by 12:30 .
user
we have the tr9533 that arrives at 11:55 . how is that ?
assistant
i need the reference number , please .
user
how many tickets do you want ? do you want me to book that ?
assistant
i only want 1 ticket please .
user
your train is successfully booked . your reference number is 2ornpxr6 .
assistant
okay great . thanks for your help .