My sister is getting married, and I'm going to see her off, what to wear and what to say at the wedding.

I don't know if you are a man or a woman.

No matter what sex, because your sister is married and you are the elder, you should dress generously and go to the table.

Say something sweet to your sister.

I'm getting married soon. I can't be a child in the future. I should take care of myself. Whatever happens, I can tell you. Even if you get married, I am still your brother (sister) and you will always be my sister. It should be very touching to hear such words. You can add something else to your relationship.

You can say that to that man.

I'm glad to be in-laws with you. My sister will depend on you to take care of her in the future. She is still young and not very sensible. Please forgive me if there is anything wrong.

That's just right.