I work for a hospital, in a role unrelated to patient care. My first out of the office message was just my name and department. After a series of increasingly plaintive messages one evening, I added, “If you are calling about patient care, you have the wrong number.”
Automatic replies help to stay connected to customers even if the particular channel is not available at that moment. When you are out of the office or busy, it is extremely helpful to provide personalized messages as it gives satisfaction and positive brand experience.

I have been out the office working from home for more than a year now. After a few weeks of remotely checking VM (and sometimes forgetting for days) I simply changed my phone setting so you cannot leave a message. I have not regretted since. On very few occasions people have clicked 0 and gone to reception. Reception can IM me and ill call or email the person back if I want or they can give them my email. Everyone else either emails me or if they already have it call my cell. Internal people never call my phone they use IM or video chat. No one internally has had an issue with this and this eliminates the whole hey call me back to spend 30 minutes talking about something that I could have answered in 2 minutes in an email.
19. "Hello, you've reached [your name]. I'm currently [exploring Asia, hiking through the jungle in Costa Rica, hanging out on the beach in Bermuda] — or more likely, [recovering from extreme jet lag, googling ‘Are red spiders poisonous,' or looking for SPF 150 sunscreen] and won't be back in the office until [date]. Leave your contact info and reason for calling and I'll get in touch then."