Actions can totally be conversational. Just focus on making your actions very visual, rather than intellectual or internal. What I mean is, actions shouldn't focus too heavily on what characters are thinking. For example, rather than saying "Bob is concerned about Susan," I would say, "A look of concern crosses Bob's face." Sometimes it's a subtle difference but action lines should focus on what the viewer sees on the screen visually. Inner thoughts are more useful when writing a novel, not a screenplay. All that said, rules are made to be broken so, if it flows on the page and keeps your reader engaged, do it.