Busy Person: "Hello"
Me: "Good Morning, this is Andy, how are you?"
Busy Person: "I am a very busy person and right in the middle of very important things. I don't have time to talk right now."
Me: "When would be a good time for me to call you back?"
Busy Person: "I don't know, I am just so busy."
Then why on earth did you answer your phone in the first place! Because you wanted to let me know how busy you were? Voice mail is great for that!