Formal — to staff
Restaurant · Dining
すみません、禁煙席はありますか?もし無ければ、喫煙席しかありませんか? — Excuse me, do you have non-smoking seats? If not, are there only smoking seats? (Restaurant · Dining, Formal — to staff, JLPT N4)
You
すみません、禁煙席はありますか?もし無ければ、喫煙席しかありませんか?
すみません、きんえんせきはありますか?もしなければ、きつえんせきしかありませんか?
Excuse me, do you have non-smoking seats? If not, are there only smoking seats?
Romaji: Sumimasen, kin'enseki wa arimasu ka? Moshi nakereba, kitsuenseki shika arimasen ka? / Reply Romaji: Mōshiwake gozaimasen, tōten wa zenseki kitsuen kanō to natte orimasu.
Reply
申し訳ございません、当店は全席喫煙可能となっております。
もうしわけございません、とうてんはぜんせききつえんかのうとなっております。
We apologize, but all seats in our establishment are smoking-friendly.
Gesture & etiquette
None specific, perhaps a slight bow.
Do not assume all places are non-smoking. Be prepared to leave if you can't find a suitable spot.