So, you are walking all day with a friend, you feel tired, you don't want to say: "I'm tired, let's stop", but say: "Oh dear, we've walked a lot today".
A friend promised to meet you to go for the football match at 9pm. It's 9 and you don't say: "You forgot the match right?", but for example: "Enjoy your dinner".
What's the word to describe these situations? Not sarcasm, because that is in a negative scope. Can we call it "rhetoric"?
Example, if the friend answers: "Oh thanks mate" and he really forgot, you would want to say: "'Enjoy your dinner' was ______".