Context does matter here. If the caller would reasonably expect you to answer the phone (such as if they were calling a store or other place of business), an apology for not being able to get to the phone makes the most sense.
Read on for 3 quick ways to improve your voicemail script. 1. Actually Write a Script! Whether you are a solo therapist recording a voicemail greeting, or you have a whole office and need a system message, don't just wing it! Take the time to actually write out a script. Read it aloud to colleagues to make sure it says what you need it to say.

Main Business Phone Line Voicemail Greetings. The business phone voicemail greeting is what callers hear when they dial your main business number. Most business phone systems provide an auto-attendant to allow you to redirect callers to the correct extension. However, if that’s not an option, we have other scripts you can use too.
As a real estate professional, you're always on the go. Whether showing homes and apartments to a prospective client or staging a home for sale, it's likely that you're out of the office quite often. Anyone in the industry knows that, out of the office is a good place to be. Unfortunately, it makes staying professional just a little bit harder. What happens when you're working with one client and another one calls? Most likely, you send that call to your voicemail box, but what does your voicemail greeting say? What should voicemail messages include? If you're voicemail isn't offering the right information, you might lose a sale.