1.) Você está conectado à caixa de correio de John Doe. Atualmente, o Sr. Doe não pode atender. Você pode ligar novamente mais tarde ou deixar uma mensagem com seu nome e número de telefone que o Sr. Doe irá lhe retornar o mais rápido possível.
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.

The insurance agent is quite polite in his approach towards his clients. He is also eager in extending his help to the client.
A formal voicemail greeting is one with a professional tone. It could be for a business or for personal reasons. Formal voicemail greetings are designed to impart a sense of authenticity. They leave the caller with a sense of trust in your abilities, whatever they may be.