Class DialogAction

const actionStatus = CardService.newActionStatus().setStatusCode(
    CardService.Status.OK,
);

const dialogAction =
    CardService.newDialogAction().setActionStatus(actionStatus);

const card = CardService.newCardBuilder()
                 .setHeader(CardService.newCardHeader().setTitle('card title'))
                 .build();

// Sets the card of the dialog.
const dialog = CardService.newDialog().setBody(card);

const dialogAction = CardService.newDialogAction().setDialog(dialog);