am looking for a train it should leave on sunday and should depart from bishops stortford
user
thank you . where is your destination ?
assistant
i am going to cambridge .
user
what time are you looking to depart and arrive ?
assistant
i want to depart after 18:30 .
user
tr0053 leaves at 19:29 and arrives at 20:07 . do you want me to book this train ? i will need your details , please .
assistant
yes , i need 1 ticket and can you please give me the reference number ?
user
booking was successful , the total fee is 8.08 gbp payable at the station . reference number is : 6w3kfy5n .
assistant
thanks ever so much ! you've been very helpful .