using System;

public class Program

{

​

    public static void Main(string[] args)

    {

        bool finished;

        do

        {

            finished = true;

            Console.WriteLine("What's your name?");

            string name = Console.ReadLine();

            Console.WriteLine("Hello, " + name);

            Console.WriteLine("What's your age?");

            string age = Console.ReadLine();

            Console.WriteLine("Your name is " + name + " and you are " + age + " years old, Correct?");

            string val = Console.ReadLine();

            while(val != "yes" && val != "no") {

                Console.WriteLine("That is not a valid response, try answering with a yes or no");

                val = Console.ReadLine();

            }

            if (val == "yes") {

                Console.WriteLine("Data confirmed, thank you for your cooperation!");

            }

            else if (val == "no") {

                Console.WriteLine("Incorrect data provided, please try again");

                finished = false;

            }

        } while(!finished);

    }

}