|Me, being dramatic|
In writing stories, it is for the author to create the scene with words, to describe and identify the characters, to give each one a distinctive voice. Show not tell, is the maxim often repeated to student writers. Through the skill of words alone, we must show the emotions being experienced by the character, rather than simply to relate what they are feeling.
The aim of both script and prose writing is to enable the watchers / readers to immerse themselves in the story being portrayed. Without the intervention of an actor, dialogue in prose has to work harder. If we keep it realistic and allow emotions to show through, the reader will forge a direct link to the character.
When it is done well, the reader will not notice the words or the page upon which they are written. They will become the character, see what they witness, experience what they feel. But overdramatise a scene and it can descend into farce.
Well written dialogue, whether on stage or in a novel, is a thing of beauty. I no longer take it for granted.