[iggy1]

Check if there is no response IE,

pawn Код:

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    switch(dialogid)
    {
        case 0:
        {
            if(response)
            {
            }
            else//second button pressed or dialog cancelled.
            {
                //your stuff here
            }
        }
    }
    return 1;
}

If there is a response the first button (or a listitem) was pressed, otherwise button 2 has been pressed or the dialog cancelled.