hey there , i am looking for a train to cambridge on saturday
user
sure , what are your travel times ?
assistant
i will be leaving after 20:45 .
user
there are 35 trains that match your request . to better help you , i'll need to know where you will be departing from and what time you want to arrive by .
assistant
oh sillly me ! i am leaving from bishops stortford . does not matter what time i arrive , just cannot leave until 20:45