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].
This is the type of message you should aim for when you are recording an answering machine greeting at your place of business. Some people do need to leave other information for business salutations, such as office hours, and they may leave special messages when they’re on vacation. Name of the business, or your name can be important too, since people may want to be sure they’ve reached the right person or business. Answering machine greetings should be pleasant in tone.

Hi, this is [Name]. I’m not currently available at the moment, but I look forward to talking with you. Please leave your contact information, along with a short message, and I’ll make certain to return your call.
Voicemails need to maintain a professional consistency that’s aligned with the entity it’s representing. That said, the structure can vary depending on the situation. There’s no template set in stone. In fact, trite and generic should be off the table. The goal should be a balance of uniqueness and practicality.