Does this first-class seat go completely flat, or am I missing a button?

How to say “Does this first-class seat go completely flat, or am I missing a button?” in Japanese

In Japanese

このファーストクラスの座席(ざせき)って、完全(かんぜん)に平(たい)らになるんですか。どこかボタンを見落(みお)としてるのかな。

Kono fāsuto kurasu no zaseki tte, kanzen ni taira ni naru n desu ka. Doko ka botan o miotoshiteru no kana.

Does this first-class seat go completely flat, or am I missing a button? in other languages