简单的Java AI响应程序？

嗨，我有这个程序：

import java.util.Scanner;

public class HowAreYou {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String input;

        System.out.println("How are you?");
        input = in.nextLine();
        if (input.equals("I'm doing good!")) {
            System.out.print("That's great to hear!");
        } else if (input.equals("I'm not doing too well...")) {
            System.out.print("Aw I'm sorry to hear that");
        } else {
            System.out.print("Sorry I didn't catch that are you doing good or bad?");
            input = in.nextLine();
            if (input.equals("good")) {
                System.out.print("That's great to hear!");
            } else if (input.equals("bad")) {
                System.out.print("Aw I'm sorry to hear that");
            }
        }

    }
}

对于前两个响应，它工作正常，如果输入的内容不是它，它会显示“对不起，我没发现您做的好还是不好？” 正确，但是我希望它在打印后再次得到响应。在它说“抱歉，我没注意到你做的好还是不好？”之后的那一刻。它不允许您输入其他任何内容。