Formal — to staff
Convenience · Store
すみません、カップ麺用のお湯はどこですか? — Excuse me, where is the hot water for instant noodles? (Convenience · Store, Formal — to staff, JLPT N4)
You
すみません、カップ麺用のお湯はどこですか?
すみません、カップめんようのおゆはどこですか?
Excuse me, where is the hot water for instant noodles?
Romaji: Sumimasen, kappu-men you no oyu wa doko desu ka? / Reply Romaji: Sochira no reji yoko ni gozaimasu.
Reply
そちらのレジ横にございます。
そちらのレジよこにございます。
It's next to the register over there.
Gesture & etiquette
Point towards the item (cup noodles), then gesture vaguely for location.
Always ask before using facilities you're unsure about. Don't leave a mess.