In this task, you have given an input which is agent's reply, based on that you have to identify what will be users' command for that reply. The user generally asks a question related to event scheduling or information of the scheduled events. Agent reply based on the available information or do the task as per user command.

Your "meeting with Nokia" is from 2:00 to 2:30 PM.
Do I still have a meeting with Nokia in the afternoon

I've changed "Dr. appointment" to be at 11:00.
yes it does

I've changed "baseball game" to be named "football game".

Yes, that looks right! Thank you.