It is important to keep in mind that when it comes to essay writing, a dialogue only really appears in one type of essay. Dialogue is defined as a literary technique that writers use to depict a conversation between two or more people. Presenting conversations you had with friends as dialogue in an argumentative essay or expository piece wouldn’t do much to strengthen your argument and would undermine your credit ability.custom essay provide you with the writing help you have been looking for also get result in any time It's important not to confuse dialogue with quotations from an outside source. they add depth, tension and character development to nonfiction writing. It also helps move the story along.