i am looking for a train going to cambridge please .
user
the train id is tr5219 and it leaves london kings on friday
assistant
does that depart from broxbourne station ?
user
sorry . i need to narrow down the 133 trains from broxbourne to cambridge . first , what day do you want to leave ?
assistant
i want to leave on sunday
user
is there a certain time of day you would like to travel ?
assistant
i would prefer to leave after 13:45 please