Here are some tips for writing dialogue in fiction stories: 1) The first step involves taking a look at your characters. Keep in mind traits such as personality, where they are from, their ages, and their education. Dialogue is a tool that you can use to show these traits to your reader without directly telling them. Taking the time to do this will help you determine not only what a character might say, but how they would say it. 2) Second, mentally picture your characters interacting as if they were on a TV show or a play. Is there anything about what they're saying to each other that seems odd or out of place? Sometimes a sentence may be correct from a grammar standpoint, but you may have to reword it for dialogue because of how people speak in reality. 3) Third, read the dialogue out loud. This will help your pacing. If you feel like you're out of breath after a string of dialogue, you may want to shorten your sentences. Likewise, if you feel like the dialogue is too short for the situation, you can smooth it out. 4) Last, do a check of your overall story. Do you have a lot of "he said" and "she replied" after each sentence? You can eliminate a lot of those after you've established who is talking. This makes the story as a whole flow a lot better. If you'd like more free tips and resources, I have links to my work in my signatures below. Have a great day!