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.
Standard greeting with phone number: "At the tone, please record your message to [phone number]."

Anyone who’s struggled to recall the correct password for their voicemail system in order to retrieve new messages probably has thought there has to be a better way.
The unavailable message is the standard greeting callers hear when they reach your voicemail box. It is the greeting that you can use consistently throughout the work year.