Whether you’re a small business or a large corporation, professional voicemail greetings make your business look more professional, and can also help to increase sales and improve customer satisfaction.
Friends and colleagues speak to each using first names only. So do people of authority. They do not call each other and leave voicemail messages asking for Mister, Miss, or Mrs. Therefore, when you call a person you want to do business with and you leave a voicemail message, refer to them by their first name only. Don't say mister, miss, or misses. Don't say their last name. Begin your voicemail message by saying only "hi/hello" followed by the person's first name. Or, you can even forget the "hi/hello" and just say the person's first name. That is how you show confidence and authority and separate yourself from weak salespeople.

While it is important to leave your contact information it is also important to leave details as to why you are calling. People have conversations with many other people every day so it is important to leave all relevant details in your message in order to jog the listener’s memory and ensure they know exactly how to respond when they call you back.
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.