A word of warning: These greetings will not do you any favors if you’re in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there’s a chance they won’t appreciate your sense of humor, opt for a straightforward greeting instead. “This is Bond. James Bond. Okay, it’s really [your last name]. [Your first name] [your last name]. I’ll get back to you as soon as I’m done helping M16 save the world — which will probably be tomorrow at the latest. Have a good day.” “Hmm. Gryffindor … No, Ravenclaw. Yes, you definitely belong in Ravenclaw. *Pause.* Okay, you haven’t reached the Sorting Hat — it’s the voicemail of [your name]. Please leave your name and number (and just for fun, the Harry Potter house you think you belong in) and I’ll return your call as soon as possible.” “Hello! You’ve gotten the voicemail of [your name]. Leave your name, contact info, and the answer to the eternal question ‘Which came first, the chicken or the egg?’ Anyone who gets it right will receive a call back.”
If they don’t leave a message, you’ll never know who called. Some people may assume they should just call back later. But if you prefer to get back to them at your leisure, encourage them to leave a message.

The above section details types of phrasing to avoid; however, it doesn’t detail what users should NOT say on their greeting. Though this is a bit loaded, as there are hundreds of combinations of things one shouldn’t say, there are some key components users should ALWAYS avoid. a. Forget About Slang: You should strive to be as professional and welcoming as possible in your greeting. While this may steer you towards using slang, in an attempt to make callers comfortable, it’ll most likely work against you. As a professional, your demeanor, tone, and speech should be clear cut and well articulated. Using slang undercuts this and works against you. b. Don’t Even Think About Profanity: This is a no-brainer. Never, under any circumstances, curse in your greeting EVER! c. Keep Your Sentences Clean, Don’t Ramble: Introduce yourself and give your caller specific direction. Avoid long diatribes detailing tangent thoughts. Keep it simple and quick. d. Always Return Your Calls: It’s important for callers to feel they are valued. Nothing dissolves this quicker than a greeting that doesn’t stress this. For example, “I’ll call you when I can,” “If I don’t return your call, please call back”—these phrases are terrible and completely destroy any good will you may have with a caller.
Website: https://www.snaprecordings.com/blog/the-top-8-voicemail-greetings-for-your-business