hi . can you help me find a train ?
user
where would you like to go to ?
assistant
i will be going to londons kings crossing .
user
sure , just let me get a little more information . where are you departing from and when did you want the booking for ?
assistant
i need to leave friday after 16:15 from cambridge .
user
tr6628 leaves cambridge on friday at 17:00 and arrives by 17:51 at london kings cross , does this suit your needs ?
assistant
that sounds great , i'll need 4 seats please and a reference number .