The Trainee joins a big corporate empire as a trainee. On his very first day of work, he dials the kitchen and shouts into the phone,
"Get me a coffee, quickly!"
The voice from the other side responds,
"You fool, you've dialed the wrong extension! Do you know who you're talking to, dumbo?"
"No," replies the trainee.
"It's the CEO of the company, you fool!"
The trainee shouts back,
"And do you know who you are talking to, you fool?!"
"No," replies the CEO indignantly.
"Good!" replies the trainee, and puts down the phone.