Mo wa nibebe, o se o
Here's a breakdown:
* Mo - I
* wa - am
* nibebe - fine (literally "in a good place")
* o se o - thank you (this is a very polite expression)
You can also say:
* E se o - thank you
* O dara - I'm okay/good (more casual)
It's always good to practice saying "thank you" in the language you're learning, as it shows respect and gratitude.