The basic rule of thumb is that callers should hear one of two things when they first connect with your voicemail — either an apology for not being able to answer the call or a “thank you” for having called. You can do both if you prefer, but keep it short and to the point.
These are just a few ideas to get the gears turning. These are simple examples, but don’t be afraid to show a little personality.

Here are some proven techniques for how to leave a voicemail message that gives you the best chance of getting a call back: Say the person's first name ONLY. Say your first name only followed by your company name. Keep your voicemail brief and urgent. Leave a reference name of a person and company you've worked with. How do you answer the phone professionally? Promptly answer calls. The average ring takes 6 seconds. Be warm and welcoming. Introduce yourself and your business. Speak clearly. Do not use slang or buzz words. Ask before you put people on hold. Don't just put calls through. Be prepared for your calls. How do you greet a client over the phone? Answer your phone with a "Hello" if you don't know who it is. Greet the caller by name if you know them. Use informal language with family and close friends. Introduce yourself by name when you call someone else.
Funny Answering Machine & Voicemail Messages In 1935, Willy Müller invented the world’s first automatic answering machine. It was a three-foot-tall machine popular with Orthodox Jews who were forbidden to answer the phone on the Sabbath.