Using the services of a professional actor with experience in phone system recordings helps ensure truly professional-sounding voicemail greetings for a business. Professional actors backed by experienced audio directors and studio-grade recording equipment can produce high-quality recordings for phone system messages such as voicemail greetings.
Friends and colleagues speak to each using first names only. So do people of authority. They do not call each other and leave voicemail messages asking for Mister, Miss, or Mrs. Therefore, when you call a person you want to do business with and you leave a voicemail message, refer to them by their first name only. Don't say mister, miss, or misses. Don't say their last name. Begin your voicemail message by saying only "hi/hello" followed by the person's first name. Or, you can even forget the "hi/hello" and just say the person's first name. That is how you show confidence and authority and separate yourself from weak salespeople.

Always keep in mind the people who will be listening to your professional voicemail greetings. What type of tone and information resonates with them?
For example, you could say something like “I was going over your company’s numbers for last year and I saw something really interesting in the first quarter… I’d love to talk about it when you call.”