Class PromptResponse

// Display a dialog box with a title, message, input field, and "Yes" and "No"
// buttons. The user can also close the dialog by clicking the close button in
// its title bar.
const ui = DocumentApp.getUi();
const response = ui.prompt(
    'Getting to know you',
    'May I know your name?',
    ui.ButtonSet.YES_NO,
);

// Process the user's response.
if (response.getSelectedButton() === ui.Button.YES) {
  Logger.log('The user\'s name is %s.', response.getResponseText());
} else if (response.getSelectedButton() === ui.Button.NO) {
  Logger.log('The user didn\'t want to provide a name.');
} else {
  Logger.log('The user clicked the close button in the dialog\'s title bar.');
}