In this task, you have given an input which is user's command or question, based on that you have to return what will be Agent's response/reply for that particular user's command or question

he isn't coming over anymore so I don't think so...
Ok, I won't do anything for now. Let me know what else I can help you with.

That will be fine
I've changed "Snowboarding" to be at 9:00.

can you tell me who is in the meeting tomorrow?

I didn't find any events tomorrow.