Tone is specific to the context and situation of what you are saying. Along with the exact words used, tone can distinguish between formal and informal. But diction of speech can also simply mean enunciation or clarity of speech. A clear speaker who does not mumble and who is properly intelligible has good diction. ExampleThe informal tone writing style is similar to how you would speak to a close friend or family member. Essentially, it's a conversational tone in which contractions, slang, and first-person pronouns are expected. And tone is a great example of that. Most writers instinctively know the tone they choose because they have read enough to do so. The tone of writing can be formal or informal. A formal tone uses a third-person point of view, where the author acts as narrator, and a more serious tone that does not use slang. Examples of informal cover letters. The most important thing to remember when writing a cover letter is that you convey relevant information concisely. Here is an example of an informal cover letter: Dear Mr. Sacrimoni, My name is Paulie and I would be delighted to join your team as an accounting manager.