code: @Controller
      public void askWhetherToRepeat(Event event) {
          if (event.getMessage().getText().contains("yes")) {
              reply(event, "Great! I will remind you tomorrow before the meeting.");
          } else {
              reply(event, "Okay, don't forget to attend the meeting tomorrow :)");
          }
          stopConversation(event);    // stop conversation
      }
docs: This method will be invoked after {@link FbBot#askTimeForMeeting(Event)}. You can
  call {@link Bot#stopConversation(Event)} to end the conversation.
  
  @param event