#include <iostream>
 #include <string>

int main()
{

std::cout << "Please enter the correct name(s): ";

std::string name = " ";
std::cin >> name;

while (name != "Alice" || name!= "Bob")
{
    std::cout << "Please enter the correct name(s): ";
    std::cin >> name;
}
if (name == "Alice")
    std::cout << "Hi Alice!" << std::endl;
if (name == "Bob")
    std::cout << "Hi Bob!" << std::endl;
}