Another dialogue problem, expository dialogue is when you use dialogue to tell us things about the story or the characters in an unnatural way. For example, “Have a great day at work in the hospital, dear.” Assuming this is a spouse or talking to another spouse, we can also assume that they already know where they work, it sounds phony and unnatural to state it, and it’s clearly done just to tell the audience that the person works in the hospital.
Or “Your sister, Beth is at the door.” Most people know the name of their sister. This sounds more like an introduction. Or, if speaking to a close friend or family member: “Hi Mary, I had a hard day working at the train station today. My boss, John, was riding me all day.” A close friend would know where the speaker worked, and probably the boss’s name. Most people don’t call people by their first names on a regular basis either. A more realistic line would be: “Work was tough, John was riding me all day.”
Expository dialogue is a common problem and will almost always be present to some extent in first drafts. It is important to review your script to make sure your dialogue sounds natural, realistic, and like something your characters would actually say. Paying attention to how real people talk, and always listening when you are out around others will help you develop an ear for natural, realistic dialogue and help you write accurate dialogue that improves your story.