If you want them to leave a voicemail, tell them right from the beginning, “Please leave your name, reason your calling, and the best way to contact you.” If you want them to call you back during normal business hours, tell them, “Please call back during normal business hours.” If you want them to call back prepared for a lengthy conversation, you can say something like, “Please refer to our website’s FAQ page,” and then provide the URL. Self-service should never be underestimated.
A formal voicemail greeting is one with a professional tone. It could be for a business or for personal reasons. Formal voicemail greetings are designed to impart a sense of authenticity. They leave the caller with a sense of trust in your abilities, whatever they may be.

Your phone system can be a powerful marketing tool for your business, and that includes your voicemail greeting. If you want to utilize this opportunity to throw in a quick humblebrag and keep callers informed of your awards and accolades, there are a few best practices, you should follow. First, keep the self-promotion brief and appropriately placed within your voicemail message. Don’t promote yourself and your products/services in the same greeting, and finally, only include current achievements in your business voicemail greeting.
Explain Your Return Call Policy: In your after hours message for the medical office, be sure to state your return call policy for voicemail response. By giving callers an estimate of when they can expect a return call from someone in your office, you can eliminate multiple phone calls from the caller, as well as reduce work for your staff members.