C++ if condition not checked after goto

I'm working on a simplish game (this isn't the whole code, just the bit that I'm having issues with) and I've run into this issue; After the condition is furfilled, it goes back to the start and it offers me to reenter the string, however, whatever I enter, I just get 'Not Valid'. Does anyone know why? I'm using the GNU C++ Compiler.

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string command;
mainscreen:
    cout << "blab";
getlinething:
    cin.ignore();
    getline(cin, command);
    if (command == 'task')
    {
        goto mainscreen;
    }
    else
    {
        cout << "Not valid.";
        goto getlinething;
    }
    return 0;
}