Could I swap my soft drink for a smaller one?

How to say “Could I swap my soft drink for a smaller one?” in Japanese

In Japanese

この炭酸飲料(たんさんいんりょう)、小(ちい)さいサイズに替(か)えてもらえますか？

Kono tansan inryō, chiisai saizu ni kaete moraemasu ka?

Could I swap my soft drink for a smaller one? in other languages