Therefore, as a rule of thumb, it has been advised that business professionals should return calls within 24 hours. If for any reason a prompt callback is not possible, for instance, if it is known that the call may be lengthy and the individual does not have time to talk until another day or so, they should still leave a brief voicemail message to acknowledge receipt of the call and advise when they anticipate being able to have the discussion. Additionally, voicemail messages should be checked at least once a day, if not more.
A word of warning: These greetings will not do you any favors if you're in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there's a chance they won't appreciate your sense of humor, opt for a straightforward greeting instead.

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.
Remember to include your name and the name of your business separately so the caller can name you when leaving a message and in any subsequent communication.