3句英文任你选

I'd like to check out.
我想退房。

I'd like to pay my bill, now.
我想现在结账。

I'm checking out now. Can I have my bill, please?
我现在想结账。请给我账单，好吗?

半个句型要记牢

check out (结账离开)

Tip:

check out还可以合在一起，变成了checkout，作名词，意思一样。