お会計(かいけい)をお願(ねが)いします。

This is the standard and polite phrase used to ask for the bill at a restaurant, cafe, or shop. 'Okaikei' means 'the bill' or 'the check', and 'onegai shimasu' means 'please' or 'I request'. Essential for concluding your meal or purchase.

レストランや店で会計を頼む丁寧な表現です。