Как написать программу-собеседника - C++

std::string ans;
std::string q1 = "Hello, It's your mum! You need to go to market and buy some vegetables";
std::cout <<q1;
std::cout << "\n To asnwer type Yes/No";
std::cin >> ans;
 
if(ans == "YES"){
std::cout << "Good son!";
}
else if(ans== "NO"){
std::cout<< "You have no choice! You must!";
std::cout<<"\n\n You try not to go, but it's your mother, so...";
}