i am looking for a train leaving on saturday .
user
there are several trains leaving on sunday . do you have a departure and destination in mind ?
assistant
the train should depart from cambridge and arrive in standsted airport .
user
i have 19 trains leaving cambridge for standsted on saturday . did you have a particular departure time in mind ?
assistant
i do not have a departure time in stone , but i need to arrive by 17:15 .
user
the tr2001 is the last train of the day and arrives at 17:08 . the train before it is tr0638 and arrives at 16:08 . do you want me to book 1 for you ?
assistant
yes , please book the tr0638 . i need 7 tickets .
user
your tickets are reserved . that reference number is 6j063kbl .
assistant
alright , since i am going to be in the city centre for awhile , could you tell me of any interesting place -s there ?