Informal:
* Koi baat nahi: This is the most common and versatile phrase, literally meaning "no matter". It conveys a casual, friendly attitude.
* Chinta mat karo: This means "don't worry" and is slightly more formal than "koi baat nahi".
Formal:
* Koi dikkat nahi: This means "no problem" and is a more formal way to say "no worries".
* Chinta ki baat nahi hai: This means "it's nothing to worry about" and is the most formal option.
Other options:
* Tension mat lo: This means "don't take tension" and is a colloquial way to say "no worries".
* Aaram se: This means "take it easy" and is a more relaxed way to say "no worries".
The best way to choose the right phrase depends on the situation and your relationship with the person you're speaking to.