Rather than waiting for a callback, open up additional channels of communication with your callers by inviting them to email. The most professional voicemail greetings often include an alternative method of communication.
The best voicemail message isn’t as good as you picking up the phone. A key to client service is being available for clients. If you find you need some help with this, you might think about hiring an assistant , how you can deal with having too much work , and how you can change your behaviors to be more productive.

A secretary in a doctor’s office creates a voicemail greeting that says, “If you have a scheduled meeting with us, we could use copies of all your medical documents from last year, so come prepared.” Using the word “could” gives patients the impression that they don’t necessarily “need” last year’s documents. See the difference between “could” and “need”? Your word choice can impact a future meeting significantly. If you want a customer to perform a specific action, you need to pay close attention to how you express your calls-to-action.
Voicemail Number: This will be used as a unique identifier for your mailbox. The minimum is adding one digit to up to ten digits, for example you can set 1 or 5432897. NOTE: The number cannot be set to 0. If you have your mailbox to 0 it's suggested to change to a different value to prevent issues with the voicemail service.