I am extremely bad at this kind of talk. I like it when it's clear. But I am in a middle of preparing a presentation for some employer whom I want to offer some

I am extremely bad at this kind of talk. I like it when it's clear. But I am in a middle of preparing a presentation for some employer whom I want to offer some consultancy. What should I do not to give him an impression that hhe can move on without me because the topic is so clear and simple?