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.

It was for 3 hours.
How long is my lunch date after that?

I’ve changed the subject of your event to basketball practice.
Well really, it's more than that. Change the name to basketball practice

Here is the list of attendees who have not tentatively accepted "bbq party": you and Abby.

Then who has not tentatively accepted the bbq party?