You can change your voice tone from the yellow box. Then open up Skype and go to Tools > Options and select Audio Settings. In the microphone settings drop down menu select Microphone (Screaming Bee Audio) That’s it. now you can call your friends with your new voice.
A good way to do this is to maybe add, “Have a wonderful day” at the end of the greeting. It’s short, so it won’t contradict the first point, and it makes the message more personal.

Another possible solution is to give callers who don’t want to leave voicemails other ways to reach you, such as by emailing, texting or visiting your website. “Solve the caller’s problem in the voicemail greeting,” Baldwin suggests. If your outgoing message is informative enough, he says, callers won’t even need to leave a message.
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.