State your number right after your name. Many people wait until the very end of the message to state their number. This will irritate the receiver of your message because if he doesn’t get it down, he then has to sit through the whole damn message again to hear it repeated.
A name recording is the most basic way to personalize your voicemail box. It inserts your name into the default unavailable greeting: “The person at mailbox [four-digit voicemail box number] is unavailable. Please leave your message after the tone. When done, hang up or press the pound key.” Dial *98 on your OnSIP-registered phone. Enter your voicemail box number. Enter the PIN/password for your voicemail box. Press 0 for voicemail box options. Press 2 to record your name. Default Unavailable Greeting

To create or change outgoing voicemail messages for individual extensions or for a Ring Group (multiple extensions).
The more personal and specific the question, the more likely it'll get a response. Think about it this way. If you start to have chest pains on a busy city street, and you cry out, "Somebody call 911!" you might get help … but you might not. However, if you were to point at one specific person and shout, "Would you please call 911 for me?" it's almost a certainty that the stranger you selected would grab their phone and dial.