i need information on a train to cambridge . i prefer to get there by 16:30
user
is there a day of the week you want to travel ?
assistant
saturday is nice
user
what about tr5729 ? it leaves at 13:17 on saturday
assistant
do not you need to know where i am leaving from ? does that train leave from ely ?
user
i am sorry that 1 leaves from cambridge . tr8176 leaves from ely at 15:35 and arrives at 15:52 .
assistant
please book tr8176 for 6 people .