LEAVE A MESSAGE PLEASE

Wasn't at my desk today. Nobody in the office (it happens)
If you call and get my voice mail.
Leave a message. Then I'll know who called
I see there was a bunch of calls on the toll free line.
Not one message. I can't call you back if you don't leave a message
( no caller id on 1-800 line)

My system turns the message into text and emails it to me.
I can check from my cell phone during the day when I'm out.
Smart phone.