Creating a professional voicemail greeting isn’t complicated, but you need to keep a few things in mind to ensure success. The following tips will help: Be friendly and welcoming - let your company's personality shine!; Have a clear voice, speak at a slow to moderate pace, minimize background noise; Ensure the greeting is human and approachable; Keep the greeting short and informative; Ensure the greeting doesn’t sound robotic or unnatural; Show your gratitude for the call by saying thank you; Manage expectations by clearly stating when the client can expect a callback.
9.) Welcome to John Doe. Unfortunately, there is no one in the office right now. Please leave your name and phone number after the tone. We will call you back as soon as possible.

An extension is a short internal number. Extensions allow users to make and receive calls. You can assign extensions to every employee in your organization.
Here is a great short example: Hello this is [first name] with {business name} in {city name} . I apologize I cannot answer the call at the moment, please leave me your name, number, and I will return the call as soon as get back to the phone. Here you have let the caller know that they have reached your business, and that you are sorry you can’t answer right away. It assures them that you are interested in their call, and that you will get back with them as soon as you can.