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

Change the duration of Car Races to 4 hours.
I'm sorry. I didn't find any matching events on your calendar.

The 2nd one works for me.
I've put that on your calendar.

Add Steven to it, please

I didn't find any matching events.