Formal:
* Jina langu ni Natasha. (This is the most common and direct translation.)
Informal:
* Mimi naitwa Natasha. (This literally translates to "I am called Natasha" and is more casual.)
Note:
* "Natasha" is a foreign name and is usually pronounced as it is in English.
* "Jina" means "name" and "langu" means "my".
* "Mimi" means "I" and "naitwa" means "I am called".
You can choose whichever phrase suits your situation best.