There you have it, a basic introduction into how to write the best voicemail greetings. As you have seen, they’re not as easy as you’d think, but once you get comfortable with the type of information required by each, writing and recording your own should be a piece of cake. If you’ve tried to write one yourself and still don’t ‘feel you’ve captured the right essence, then please look at one of our voicemails greeting templates. When it comes to recording it, remember to rehearse your script and speak clearly. If you don’t care for your own voice, then have someone else record it, or hire a professional voice actor. Remember, there are also free audio editing software programs like Audacity, where you can manipulate your recording until you get exactly what you want.
Hello, you have reached Dr. A. We are busy assisting patient on the another line. Please, leave your details, including the case number if applicable, name, and phone number. For a medical emergency, hang up and call 911.

In my (US-based) experience, doctor offices & the like have a place where you can fill out if they can leave messages or not (and some even have asked detailed messages vs callback messages), so that's my perspective! And that I can set different things for different numbers. So my cell phone they can leave detailed messages on any matter, my mother's house phone is detailed from billing only and otherwise callback, her cell phone is callback only. (And they also aren't allowed to tell her anything other than billing, so even if she does call them back about anything else! That was just a measure set up when I lived with her one summer & had no cell reception at her house.)
11. "Hi, you've reached [company]. Unfortunately, we're currently unavailable. But we want to talk to you — so please leave your name and number, as well as your reason for calling, and someone will call back ASAP."