Before the digital era, he says more than 80 percent of business lines had voice mail. Now, he estimates only a third of office phones have it.”For customers, even the most professional voicemail greeting is impersonal, and may even harm customer experience (millennials, in particular, avoid using voicemail altogether).
Some people, even most people, would always rather just speak to a person first, rather than listen to a recording of your office directory or department extensions. If you want to offer the operator first, try this:

It’s important that your voicemail makes a good impression and conveys professionalism to anyone who calls. Here at UniTel Voice, we specialize in helping business owners set up a virtual voicemail system that not only helps them sound professional but also keeps them connected with voicemail-to-email and voicemail transcription (voice-to-text) technology.
Give them a reason to call you back. In both voicemail messages, did you noticed how I mentioned new information they might be interested in? That will grab their attention more than simply introducing yourself, thanking them and asking them to give you a call if they have any questions. Come from a place of helpfulness by giving them something to look forward to and that will solve a problem.