i am looking for a train to stevenage .
user
ok . where are you leaving out of ?
assistant
i am leaving out of cambridge .
user
great there are 70 trains , do you have a day or time ?
assistant
i need to arrive by 9:30 on thursday .
user
tr2016 leaves at 05:21 and arrives by 06:10 . would you like to book this train ?
assistant
yes for 4 people please . i will need the reference number .
user
4 tickets to arrive by 9:30 !
assistant
can i have the reference number for the train booking please ?
user
i have another train that leaves at 07:21 and arrives at 08:10 if that would be better ?
assistant
that is not better . i would like a reference number for the 4 tickets already booked , please .
user
sure thing . the reference number is l130xfn9 . how else may i help ?
assistant
thanks . that s all i need . have a good day .