On his first day on the job, the trainee dialed the kitchen and shouted into the phone.
“Get me a cup of coffee, quickly!”
The voice from the other side responded,
“You fool, you’ve dialed the wrong extension! Do you know who you’re talking to?”
“No,” replied the trainee.
“It’s the Managing Director of the company, idiot!”
The trainee shouted back: “And do you know who You are talking to, you idiot?”
“No!” replied the Managing Director indignantly.
“Thank god for that!” replied the trainee and slammed down the phone.