You have stated your calls-to-action. Now you have to make sure they know the process to follow. If you want your customers to leave their voicemail messages, you have to tell them from the start, “Kindly leave your name, purpose of your call, and how to contact you.”
Writing a script doesn’t mean you have to write a speech. A simple greeting is fine, like this sample voicemail message:

For instance, good voicemail greetings at corporate firms create a pleasant impression on the caller’s mind or a hilarious voicemail can make someone’s day. Parents can be assured that an urgent message will be delivered once you get access to your phone. As greeting messages should reflect your mood and your personality, they must be
Providing a receptionist, secretary or assistant with a telephone message pad or while-you-were-out pad can help ensure a greater degree of organization and communication at work. Look for a phone message book that includes several message sections per page and creates a carbonless copy, so the original copy can be given to the message recipient and the other stored in the book. Consider options that include a repositionable adhesive backing, so the message-taker can place the message in plain view, like on a computer monitor, for the recipient. Also look for message pads in bright colors with single message spaces per page and extra note-taking space.