I'll just open the window a little wider. Just one leg at a time, Buddy. You can do it. Here we go. Improve the literary dialogue for speaking.
Great writers expect people to read their works silently.
The dialogue they write is not intended to be spoken aloud. As a consequence, quoted material does not often make good radio dialogue. To improve the dramatic quality of short story or novel dialogue, shorten the sentences and simplify the language. Make the sentences active voice. You may discover there's very little to change.