Note: The best voicemail message you can leave is one with a specific purpose that addresses the needs of your prospect or client, and offers them a solution that is worth them taking the time to call you back to learn more about.
Whether it’s an out-of-stock product, a canceled event, or social media snafu, there are times when your business may see an influx of frustrated callers. While it is important to address their concerns head-on, you may not be able to answer each call as it’s received. Make sure you use best practices for dealing with angry customers, and that your voicemail greeting sets the appropriate tone. Avoid defensive language, validate their concerns, and keep them informed as to how you are handling the situation.

Website: https://blog.zencare.co/what-to-expect-on-an-initial-call-with-a-therapist/
Be brief. Don’t make your listener resent you for leaving a 5 minute long message. People are busy. Listening to 5 minute phone messages is not on the top of their priorities and wastes their time. Many callers seem to think they are the only person in the world leaving a voicemail for a particular person. Yet a dozen other people feel the same way and a man ends up holding the phone to his ear for an hour.