How to reply when the girl says she will give me a gift?

If you want to accept a girl's gift, you can politely thank her and accept it. You can say, "Thank you, I like this gift very much." Or: "I am very grateful for your gift, and I will cherish it."

If you don't want to accept a girl's gift, you can politely refuse. You can say, "Thank you for your kindness, but I don't want to accept this gift." Or: "I appreciate your idea, but I don't want to accept this gift."

Whether you decide to accept or reject a girl's gift, you should be polite and respectful.