Saying thank you is important in every culture. Saying thanks in the language that is native to your company is not only the way to demonstrate your knowledge but also a sign of consideration that is always valuable and appreciated.  

This is how you thank someone in Russian:

Cпасибо — Spa-see-buh — Thank you

Большое спасибо — Bal'sho-ye spa-see-buh — Thank you very much.

Благодарю — Bluh-guh-da-ryu — I am grateful

And the right answers would be...

Не за что— Nye zuh shtoh — No problem

Пожалуйста — Pa-zhuh-loo-stuh — You are welcome (same as please)