A Nice Joke

A man joined a big Multi National Company as a trainee…..
On his first day, he dialled 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 dialled the wrong extension! Do you know who you’re talking to?”
“No” replied the trainee.
“It’s the Managing Director of the company, you idiot!”
The trainee shouted back: “And do you know who YOU are talking to, you IDIOT?”
“No!” replied the Managing Director angrily.
“Thank God!” replied the trainee and put the phone down…..