I like to say my phone number very early so the person can hear it again quickly by starting the message over and does not have to listen to your entire message again to hear the number. But do repeat your telephone number at the end of the message at least once and speak very s-l-o-w-l-y so the person can write it down as they listen. If you don't get a response to your first voicemail, don't hesitate to record a similar message once a week for two or three weeks. This sounds a bit excessive, but my experience has been that if there is even the slightest chance of meeting someone now or even in the near future, this kind of message will get their attention.
"[Auto-attendants] assist a business of any size in presenting a more organized, efficient, and, if necessary, more robust picture of itself,” points out Brandi Armstrong, Co-Founder of Telecentrex and blogger on evancarmichael.com. The right greeting can make the difference between a frustrated customer or a satisfied one.

Website: https://shoretelcommunity.force.com/s/article/How-to-Manage-Your-Voicemail-Greetings-Using-a-Cisco-Phone
My number is [phone number]. I’ll also follow up with an email tomorrow. I look forward to hearing what you think. The key to making a script work is to practice. You can’t read it line-for-line, so it’s important to work out the kinks before you place your call, including: Your name Your reason for calling The benefit of calling you back Your contact information Your promise of a follow-up email