Consider adding 'You can also email your query to us at [insert email address here]. These queries will be answered within [insert time frame].' Again, if you intend to make a promise to your customer in a voicemail, ensure you keep it.
I have a confession to make: I haven’t recorded a new voicemail greeting since 2014. In the past four years, I (hopefully) have become more articulate, poised, and self-assured. But hear my voicemail recording, and you’d think I was still new to the work world, a little unsure of myself — and probably not an authority. Obviously I need toupdate it. And if you haven’t changed your voicemail greeting in over a year, you’re likely in the same boat. After all, a professional voicemail recording boosts your credibility, makes you seem more competent, and encourages whoever’s listening to it to continue the relationship. A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction. With that in mind, I’ve written 18 unique voicemail greetings for every situation. Pick your favorite, practice a few times, then record your new voicemail.

With all these things to include, it's easy to write your greeting the wrong way. To keep it simple, something like this:
Some people try to get really fancy with their voice mail greetings and they will put the current date on their message. This requires you to update your voice mail greeting daily. This level of customization is completely unnecessary and often leads to problems when the user forgets to update the actual date itself. However, updating your outgoing voice mail message to reflect a particular season or holiday can be a nice touch as long as you remember to change it accordingly.