Learn from TOS

It was lucky I met with the tuk tuks driver..T O S

He was smiling like Indonesian but the TukTuk drivers do speak less English .
All the way I learned a lot about the language of Thailand is a popular one

MAI PEN RAY 

Mai pen rai ( the way to say this phrase is my- pen -rye )
Means ; its nothing
Never mind
No prob
Its ‎​​;)kªªý™
No worries

Take it easy

Also if we say ' thank you ' in thai languange ( ka kun kah ) , they are likely to respond wit a "mai pen rai "
  same like The expression can also be used as “your welcome” after someone says “thanks.”
In short, mai pen rai is ultimately a philosophy of life: Bend with the wind, like a bamboo tree. And above all, keep smiling.

Let me explain deeper ..\

How to use.

This phrase has some situations to be used.

If you are apologized for [Kow Tot Krap] when you had been stepped on your foot,
let's say as
Mai Pen Rai Krap = It's all right.

If you meet a person who is deeply worrying some thing,
let's cheer up him as
Mai Pen Rai, Mai Pen Rai

If business is dull with a depression in trade,
let's say with good laugh as
Mai Pen Rai, Mai Pen Rai ^)^...

Tos, thank you, I learned a lot from you