You may compose a tale without any conversation. You may also write a tale based just on conversation. There have been many, many stories written without dialogue. Many outstanding ones have done so successfully. The problem with writing without dialogue is that your readers will be unable to visualize what is happening in the story.
Writing with dialogue makes the job of the writer much easier because they do not have to worry about describing scenery or action. All the writer has to do is make sure each character says something worth hearing and that their conversations make sense within the context of the story.
Some writers like to think of their tales as plays performed before an audience. They then divide up the roles between characters. Each person gets a part to play. Sometimes these parts are spoken out loud, other times they are shown through body language or implied through the tone of voice used by the speaker.
Writing with dialogue is easier said than done. It requires skill and experience to achieve success at this game. However many beginners start off by writing tales without any conversation at all. These stories are called "saga" stories. They can be as long or as short as you like!
The assertion about conversation in short stories that is accurate is that dialogue utilizing the character's own words is one approach for a writer to demonstrate rather than tell readers what a character is like. This method allows the author to develop characters through discussion.
There are two ways writers can show, not tell, their characters' thoughts and feelings through dialogue: by using detailed verbal portraits of people talking (this is called "dialogue writing") or by using descriptions that convey personality traits (this is called "scene writing"). Both methods are effective, but each has its advantages and disadvantages. Dialogue writing is easier than scene writing for new authors because so much can be said in a few words or phrases. However, dialogue writing is also more difficult because it requires careful planning ahead of time when writing the next sentence or phrase that will lead into the conversation.
For example, if a writer wants his character to comment on how cold it is outside she won't simply say "It's cold out," he will need to plan ahead to have something relevant to say about the weather. The same thing goes for characters discussing their feelings; they don't just talk about them, they also act out certain emotions such as anger or sadness by displaying certain physical behaviors (for example, raising your voice or tearing up).
If the goal of your dialogue is to convey information that you couldn't divulge through exposition while simultaneously making the plot feel more real and natural, I believe realistic dialogue is perfectly fine and even desirable.
After all, what is dialogue for if not to tell a story? And how can you tell a story if not through conversation?
So long as you are aware of the difference between expository dialogue and realistic dialogue and you don't use one type of speech pattern for one type of scene/characte rand another for another, I see no problem with writing realistic dialogues.
The quick answer is yes. It is possible to begin your novel with dialogue. There are several ways to begin a narrative, and this is one of them. However, you must do so in a way that assists the reader in understanding the plot and its characters. Starting a story with dialogue can be difficult because there are no chapters or scenes; instead, the reader is given a glimpse into the lives of several different people as the story progresses.
There are many examples of novels that begin with dialogue. Some popular ones are The Great Gatsby by F. Scott Fitzgerald and A Streetcar Named Desire by Tennessee Williams. Both of these novels are considered classic works of fiction and have been cited as influences on many writers since their releases.
They both follow the same format as any other novel: there is a setting and a character development section followed by a plot summary section. Then the action begins, and it continues until the end when there is a resolution or climax. These books are interesting to read because they show how successful writers can make use of limited space to tell vast amounts of information about several different people and events while still keeping the story moving forward at a good pace.
Another reason why starting a story with dialogue is a good idea is that it allows you to show, not tell. In a scene where someone is talking, the writer can add description to help the reader understand what is going on around them.