i am planning a trip in cambridge .
user
i am glad that you are visiting , but i cannot help you until you give me something to search for ?
assistant
i am looking for a train from cambridge to leicester on monday .
user
we have quite a few trains available that day . is there any time you would like to depart or arrive by ?
assistant
i need to leave after 21:45
user
tr2919 is leaving at 22:21 , would that work ?
assistant
yes , could you book me 2 tickets and get me a reference number ?