AI planning tasks in specific time slots

So I wanted to let the AI change the time it plans tasks in- not "all day where there is any space." Can it do that?

I also asked the AI to plan my tasks for me in a specific time slots and it didn't recognize the name of the time slot I meant.

Is there a way the AI would be able to do that for me? If not, that would be a recommendation to update...🤔