The phrase should imply they will call you back — not that you desperately hope they’ll call you. And whatever phrase you choose to use, make sure it sounds like something you’d naturally say so you can deliver it with a confident tone.
Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.

This is frustrating on many levels because it leaves you wondering if there is a need to take a different route to get an answer to a problem or to just wait for the return phone call. When leaving a voicemail message, there are 7 pieces of information that can help the caller. 7 Things to Include in a Voice-mail Message 1. Identify the Voice
The 8 Rules of Phone Etiquette at Work. Follow these 8 rules for good phone etiquette on the job. Be prepared. Get familiar with your phone, and learn how to transfer calls. Answer right away. Answer within three rings. Announce yourself. "Thanks for calling Company Name" . Be an active listener.