How to Say I'm Ready for a Check

When we were in Italy recently, we often struggled with knowing the polite way to phrase a request or ask for something.  We could get the point across, but we lacked nuance with the language.  Today we discuss phrases you can use to be polite in American English, like, “would you be able to tell me if you have ___”, or “we’re ready for the check, when you get the chance.”