A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction.
2. Hello, you have reached the office of [your name]; I will be out of my office starting on [date] and will be returning on [date]. You can call me when I return or leave a brief message. If this is an emergency I can be reached on my cell, which is [your number].

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.
Before you record a professional voicemail greeting, you may want to consider the type of people who might call your home or business. That way, you can think about the information these callers might need before you compose your greeting. Most callers are familiar with how to leave a voice message, so try to avoid giving them instructions. Some things you may want to include in your greeting might be your full name, title, name of your company, and an alternate method of reaching you. If you plan to be unavailable for some time, it can be a good idea to tell your callers when you will return and give them the name and phone number of another individual to call in the event they need immediate assistance. A private voicemail box enables a person to receive telephone messages when the phone cannot be answered.