i am looking for train that go to cambridge that leaves on tuesday .
user
sure . where are you departing from ?
assistant
i am leaving from norwich and would like to leave after 12:15 , please .
user
there are 12 possible trains leaving after 12:15 . should i book you on 1 of them ?
assistant
i am sorry . i need the train to leave after 21:15 from norwich . are there any available ?