code: public ResponseBuilder addConfirmSlotDirective(String slotName, Intent updatedIntent) {
          ConfirmSlotDirective confirmSlotDirective = ConfirmSlotDirective.builder()
                  .withSlotToConfirm(slotName)
                  .withUpdatedIntent(updatedIntent)
                  .build();
          return addDirective(confirmSlotDirective);
      }
docs: Adds a Dialog {@link ConfirmSlotDirective} to the response.
  
  @param slotName name of slot to elicit
  @param updatedIntent updated intent
  @return response builder