For phone greetings to be successful, they need to be: Crisp. A crisp, clear voice goes a long way. The message needs to be clearer than glass. No shuffling papers or dogs barking in the background. **Professional. **Your phone greeting needs to sound like you're a real company, not a random person answering their cell phone. Thought-out.
This video on English Voicemail Greeting Sample covers the key areas of English pronunciation such as double / diphthong vowels, long vowels, word stress and word endings and more.

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.
7. “Hi, you’ve reached [your name] at [your company]. Sorry I missed your call. I’m especially busy today, but if you leave me your name, phone number, and a brief message, I’ll get back to you within the day. Chat soon!” Your callers want to hear from you soon. Calling back within the business day lets them know you’re reliable despite how busy you are.