“Hello, this is So-and-so, my number is blah blah blah, yadda yadda, extension such-and-such. It’s very important that you call me back. This is not a sales or solicitation call.”

Here’s a clue, people. If you don’t tell me either who you represent or what the call is about, preferably both, you are not getting a call back from me. Period. Have a nice day. (And by “nice” I mean something else entirely.)