Kinnitav inglise keeles

I am affirmative that this is the right thing to do.
Ma olen veendunud, et see on õige asi.

The affirmative response to his question was met with a smile.
Jaatav vastus tema küsimusele võeti vastu naeratusega.

In an affirmative manner, she nodded her head and agreed to the terms.
Ta noogutas jaatavalt pead ja nõustus tingimustega.

I need assurance that this will work.
Mul on vaja kindlustunnet, et see toimib.

I can give you my assurance that it will be done.
Võin teile kinnitada, et see tehakse.

I am looking for some assurance that this is the right decision.
Ma otsin kindlustunnet, et see on õige otsus.