Changing Agenda Template for selected meeting

Hello
I have selected our 3 speaker saved agenda template for our meeting on 22 July. How do I change that meeting to use our 2 speaker saved agenda template instead?

No roles on that agenda have been assigned yet, so you can simply delete the agenda (bin icon), and then create a new agenda using the required template

Thank you. I wasn't sure what I was actually deleting if I used the delete button. I didn't want to delete the whole meeting (date set included) or whether it was something else.

You could just delete the 3rd speech and evaluation. that works too.