“Hi! You have reached [your business]. All of our staff are currently busy helping other callers. We understand how valuable your time is, and rather than keeping you on hold, we will make sure to call you back.Be sure to leave us a detailed message with your name and number. We will return your call within two business hours. Thanks!”
After JPMorgan Chase said last week it was canceling voice mail for most of its employees, I sent the bank's public relations department an email.

Professional — Lets them know who they’ve reached, why their call has not been answered and when they can expect a return call.Personable — Lets them know their message has been received by a real person who values their call and will reach back out to them. Including humor and a personal touch is extremely important here (even if your industry prefers to be more “robotic” in their communications). What is the most professional voicemail message?
Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.