i am traveling to cambridge and i need a train that leaves on friday .
user
where will you be coming from , and what time would you like to depart from there ?
assistant
i would like to get on the train at london kings cross and arrive in cambridge by 15:15 .
user
tr4748 leaves kings cross at 13:17 and arrives at 14:08 . will that work ?
assistant
that sounds perfect ! can i purchase 3 tickets on that train , please ?