Formal — to staff
Convenience · Store
すみません、お手洗いはありますか? — Excuse me, do you have a restroom? (Convenience · Store, Formal — to staff, JLPT N5)
You
すみません、お手洗いはありますか?
すみません、おてあらいはありますか?
Excuse me, do you have a restroom?
Romaji: Sumimasen, otearai wa arimasu ka? / Reply Romaji: Mōshiwake gozaimasen, tōten ni wa gozaimasen.
Reply
申し訳ございません、当店にはございません。
もうしわけございません、とうてんにはございません。
I'm very sorry, but we do not have one in our store.
Gesture & etiquette
Slight bow or polite nod when asking. If denied, a slight bow to thank them for the answer.
Not all convenience stores have restrooms for public use. Be prepared for a 'no' answer.