Note: Voicemail, Visual Voicemail, and Voicemail transcription are available from select carriers in select countries or regions.
To create a greater sense of authority, and that you are somebody important, list the name of a person and company who you've worked with before, especially if that person and company is a direct competitor of the person you are calling. Nothing grabs the interest of the person you are calling faster than hearing the name of their main competitor.

While email and text support saw an increase in recent years, many customers, partners, and potential hires still prefer to call your company directly. When writing your voicemail script, include basic information such as a short greeting, your company name, an invitation to leave a short message, and the time frame in which the caller can expect a return call. If relevant, you may want to include your office hours, extensions for company departments, and the contact information for your office manager or HR department.
“(Intro) I’m calling regarding the voicemail I left you (earlier today/yesterday) about (example: how we recently helped competitor 1, 2, and 3 avoid ______ while ______) and wanted to see if it would make sense for us to have a conversation to determine if what we do would be of some help to you as well. If you’d like to discuss this further you can reach me at __________. I’ll send a follow up email to this message so if it’s easier to reply that way you can or if you’d rather talk via the phone, again, my number is _________.”