Mistakes :)

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 down the phone.