If they are calling without an expectation that you always pick up (such as if you are a business coach or a one-man shop) then thanking them for calling might make the most sense.
Whether you’re out for the day or are off for the week, the first rule of an out of office voicemail greeting is: let callers know when you’ll be back! You’ll save them the frustration of continuing to call and yourself the hassle of listening to redundant voicemails. It’s also a good idea to set the expectation of whether you are answering messages while you’re away, and who they can reach for assistance in your absence.

For a medical office, call types may include billing, emergencies, appointments, cancellations, etc. 2. Determine How To Best Route Calls The best method of routing your medical office calls will depend on your office size and budget. If you have a small staff, setting up a standard voicemail greeting system may be a more practical approach. For a larger health organization with multiple departments, it makes more sense to route calls to their intended destinations by using an auto attendant. For example, “If you have a question about billing, press 1. If you’d like to schedule an appointment, press 2. If this is a medical emergency, press 0 for an operator.” If you want every caller or patient to experience a professional and compassionate call, you may consider working with a medical office answering service. You can forward calls to an answering service after business hours, on holidays, during overflow, or any other time you may need help answering calls. 3. Draft A Script
A professional voicemail greeting is essential in many aspects of a business. In sales, it enables you to properly respond to inquiries from prospects and customers or discuss a deal in more detail. When they call, and you can’t answer, you may lose the opportunity for immediate communication and potentially lose a client or customer.