Formal — to staff
Convenience · Store
You
すみません、このお弁当、温めていただけますか？
すみません、このおべんとう、あたためていただけますか？
Excuse me, could you heat up this bento (lunch box)?
Romaji: Sumimasen, kono obentou, atatamete itadakemasu ka? / Reply Romaji: Hai, kashikomarimashita. Shoushou omachi kudasai.
Reply
はい、かしこまりました。少々お待ちください。
はい、かしこまりました。しょうしょうおまちください。
Yes, certainly. Please wait a moment.
Gesture & etiquette
Presenting the item with both hands politely.
While usually not an issue, it's generally best to ask before or during payment. If you've left the store, it might be more awkward, but they will likely still help.
#convenience store#bento#heating#food#service