Here's the code first of all:

#include <iostream>
#include <string>

using namespace std;

int main()
{
string name;
string answer;

cout << "Hello, what is your name?" << endl;
cout << endl;
cin >> name;
cout << endl;
cout << "Hello, " << name << " would you like to play a game." << endl;
cout << endl;
cout << "Pick 1 for yes and 2 for no." << endl;
cout << endl;
cin >> answer;
cout << endl;
int yes = 1;
int no = 2;

if (yes == 1) {
cout << "Okay, we will play a game" << endl;
cout << endl;
}
else if (no == 2) {
cout << "Okay, we won't play a game." << endl;
cout << endl;
}
else {
cout << "Sorry that was not a choice please pick yes or no." << endl;
}

How do i make it so that if i enter any number besides 1 or 2 it will say "Sorry that was not a choice."? And then it will keep asking me to choose 1 or 2 until i choose one of those numbers? Because right now i can put any number in and it will say "Okay, we will play a game." (except for 2 then it will say "Okay we won't play a game.")

Thanks!