Here, the ophthalmologist is not in a position to receive a call. However, he/she makes sure the patient’s need is addressed.
48. Hello, you’ve reached [name] at [company name]. If you need help with [X reason], please contact [X person/X system] or [visit our website at X and send us an email]. For all other inquiries, please leave your name, phone number, and a message, and I’ll get back to you as soon as I can.

Of course, yours may need more details. But, even if you’re changing your outgoing message every day, it should only be a slight variation from a standard greeting.
I have a confession to make: I haven’t recorded a new voicemail greeting since 2014. In the past four years, I (hopefully) have become more articulate, poised, and self-assured. But hear my voicemail recording, and you’d think I was still new to the work world, a little unsure of myself — and probably not an authority. Obviously I need toupdate it. And if you haven’t changed your voicemail greeting in over a year, you’re likely in the same boat. After all, a professional voicemail recording boosts your credibility, makes you seem more competent, and encourages whoever’s listening to it to continue the relationship. A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction. With that in mind, I’ve written 18 unique voicemail greetings for every situation. Pick your favorite, practice a few times, then record your new voicemail.