"I'm sorry�" followed by the mailbox owner's name (as recorded by the owner or administrator), then "�is currently on the phone" then the owner's personal greeting, and then the fixed system prompt, "Begin speaking after the tone, then hang-up when you are finished or press any key for further options."
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.

Shut the office door and turn down the music—it’s time to record! Pretend that your office is your music recording studio as you prepare to vocalize your message. Remember that obscene background noise can be a major turn off to potential customers and prospects.
Promote your business to the callers while they're on hold. Inform them of your range of products and services, their benefits and how they can help them. Or just re-enforce your branding with some pleasant background music.