Find some common ground. If you’re cold calling someone, your voicemail is your 30 second chance to make a connection and leave a good impression. One of the best ways to make a connection in that short amount of time is mentioning a mutual acquaintance. You could also mention a shared affiliation with an organization.
There is no definitive answer here, but you should include one of the two at the beginning of your message based on what makes the most sense.

Covid-19 is creating a lot of firsts for many businesses. School districts, theme parks, government agencies, restaurants, and retail stores in nearly every state are closing and monitoring the situation every day. It’s important to update your phone system messages as new information becomes available.
A good voicemail greeting is short and professional, lets people know that you’ll get back to them, and invites callers to continue engaging with a call-to-action. You should also show your personality if you’re in an industry or role that allows that. If your industry is more conservative, however, you’ll want to keep humor and personal touches to a minimum. A greeting Your name Your company A simple explanation for missing the call (e.g. you’re away from the phone or are on holiday) A rough estimate of when you’ll get back to the person An alternative person to reach out to (if you’re out of office) An alternative mode of communication (if you prefer email or text) A call-to-action such as “Leave a message” or “Send me an email at [email protected]”