“Hello, you’ve reached [X company]. We can’t take your call right now, but please leave your name, contact information, and reason for reaching out, and one of our team members will be in touch within 24 hours.” “Hi, you’ve reached [company]. Unfortunately, we’re currently unavailable. But we want to talk to you — so please leave your name and number, as well as your reason for calling, and someone will call back ASAP.” “Hi, you’ve reached [company]. We’re available by phone from [hour] to [hour] [time zone] Monday through Friday [optional: and from hour to hour on the weekends]. You can also contact us by going to our website, [URL], and live-chatting or emailing us. If you’d like us to call you back, please leave your name and number after the beep.” “Hello, you’ve reached [company]. If you’re looking for information on [X], please check out our [Facebook page, company website, etc.] If you want to know more about [Y], take a look at [Z page on our site, our YouTube channel, etc.] Still have more questions, or just want to hear our lovely voices? Leave your name and number, and we’ll return your call straight away.”
-…and I’ll return your call as soon as possible. I would have answered, but I was already on the phone with Bill Gates—I swear.

If you are a burglar, then we’re probably at home cleaning our weapons right now and can’t come to the phone. Otherwise, we probably aren’t home and it’s safe to leave us a message.
Your voicemail needs to have relevant information such as your name, who the prospects are connecting to, the department you work in, why your not available to assist your prospects, when you will call them and related information, this is what the prospects would prefer hearing instead of dragging the voicemail messages speaking about your brand and more.