are there trains leaving cambridge after 18:15 ?
user
yes . can you help me narrow down the choices with a day to leave and destination ?
assistant
i am looking for 1 that goes to stevenage on saturday .
user
i have a train leaving at 19:21 and arriving at 20:10 , if that works .
assistant
yes , can you book 3 tickets on it , please ?
user
booking was successful , the total fee is 30.72 gbp payable at the station . reference number is : s74f7izs .
assistant
great ! can you help me find a cheap restaurant that serves the americas food ?