What's Your Name?

Mr.Knott is a teacher of a school in London. It's a long way to his school from his house so he is usually tired when he gets home.
One day, he got home, was tired as usual. He was in bed when someone called him. He went downstairs, picked up the phone and said,' Hello. Who's speaking. please?'
- Watt.
- What's your name, sir?
- Watt's my name.
- Yes, I asked you that. What's your name?
- I told you. Watt's my name. Are you Jack Smith?
- No, I'm Knott.
- Will you give me your name, please?
- Will Knott.
Both the men hanged up the phone angrily and thought "What a stupid, rude man."