Free voicemail greetings

This is Captain Jean Luc Picard of the USS Enterprise. Captain, we are being hailed because I know that data. But what could it be? A phone call? An answer, perhaps. It is scanning us, but is it alive? It is a life form and it has intelligence. How do you know, Sir? It's trying to communicate with us. Touching. Quite stimulating, wouldn't you say? Indubitably. What does that mean? I was just being polite. Sir. We're gonna go off hailing frequencies.