1. If your daughter doesn't want to sell it to him, you can answer him like this: "I'm very sorry, this dress is my daughter's personal belongings, so I can't sell it to you. However, I know where this dress was bought, and I can tell you the detailed address. There are many other styles there that may suit you better. "
If your daughter is willing to sell it to him, you can answer like this: "Really? You like this skirt, too This style is really good. Your eyes are fine. If you really want it, I will ask my daughter first. After she agrees, I can show you the receipt of the clothes I bought at that time. What price do you think is right? "