("Good interpersonal communication means getting the decimal point in the right place.")
AUDIO (NOT VIDEO) RECORDING:*BEEP*
"You have reached the mailbox of Dr. Hermann Gottlieb.
After the beep, you may leave either an audio or video message.
As I will see I've missed the call, I would prefer you do leave the message, for context for when I must respond.
So please consider may to be a strong shall.