YOU SAID:

I'll have a cup of coffee please.

INTO JAPANESE

コーヒーをお願いします。

BACK INTO ENGLISH

I'd like some coffee, please.

INTO JAPANESE

コーヒーを下さい。

BACK INTO ENGLISH

coffee please.

INTO JAPANESE

コーヒーをください。

BACK INTO ENGLISH

Coffee, please.

INTO JAPANESE

コーヒーをください。

BACK INTO ENGLISH

Coffee, please.