You could say... 안녕하세요. 제 이름은 "Rizky" 입니다. 만나서 반갑습니다. (Hello. My name is "Rizky. nice meeting you.)

You should provide more information. Each person's introduction is going to be unique^^ It also depends on what kind of information you'd like to share in an introduction. Are you looking for a framework? Anyways, more information would be useful. And do you mean formal or polite language? Polite would be more colloquial.