cordovaDialogs is showing default text, Not showing custom text

I am trying to show confirm box, which is working fine. But it showing default text, ok and cancel .

i want to show different text. Also Can we show three buttons as well.

$cordovaDialogs.confirm('message', 'title', ['button 1','button 2'])
    .then(function(buttonIndex) {
      // no button = 0, 'OK' = 1, 'Cancel' = 2
      var btnIndex = buttonIndex;

Any idea?