Soothing tension with a laugh

In The Restaurant.

+ Waiter! There's a fly in my soup!
- Don't worry, sir. The spider on your bread will kill it.

+ Waiter! What's this fly doing in my soup?
- I think it's swimming, sir.

+ Waiter! What's this fly doing on my ice cream?
- I think it's learning to ski, sir.

+ Waiter! Your thumb is in my soup!
- Don't worry, sir. it's not very hot.

+ Waiter! I'll have coffee without milk, please.
- We haven't got any milk, sir. Would you like coffee without cream?

+ Waiter! This coffee tastes like soap!
- Ah, that must be tea, sir. The coffee tastes like glue.

+ Waiter! How long will my pizza be?
- It won't be long, sir. I'll be round.

(quoted from one stop English, http://www.onestopenglish.com/skills/writing/miscellaneous-worksheets/at-the-cinema/151791.article)