any trains leaving after 18:00 ?
user
there are lots of trains that leave after 18:00 . where would you like to travel ?
assistant
i would like to travel to the stansted airport and leave from cambridge .
user
great ! that narrows it down a lot . what day will you be leaving ?
assistant
we will be leaving on tuesday . please book 4 seats on the train and provide the reference number . thank you !
user
ok , you have 4 tickets reserved on tr9495 , leaving cambridge at 18:40 on tuesday . the total fee at the station will be 40.4gbp , and your reference number is 4ll98nyc .
assistant
i also need a moderate priced guesthouse .