please find me a train that leaves on monday after 08:45
user
where are you going or coming from ?
assistant
i will be leaving cambridge and heading to ely .
user
is there a certain time you need to arrive by ?
assistant
i just need to leave after 08:45
user
the tr8399 leaves from cambridge on monday at 09:50 . shall i book that for you ?
assistant
yes , for 2 people . please give me the reference number .