code: public static AirlineFlightUpdateTemplateBuilder addAirlineFlightUpdateTemplate(
  			String introMessage, String locale, String pnrNumber,
  			UpdateType updateType) {
  		return new AirlineFlightUpdateTemplateBuilder(introMessage, locale,
  				pnrNumber, updateType);
  	}
docs: Adds an Airline Flight Update Template to the response.
  
  @param introMessage
  the message to send before the template. It can't be empty.
  @param locale
  the current locale. It can't be empty and must be in format
  [a-z]{2}_[A-Z]{2}. Locale must be in format [a-z]{2}_[A-Z]{2}.
  For more information see<a href=
  "https://developers.facebook.com/docs/internationalization#locales"
  > Facebook's locale support</a>.
  @param pnrNumber
  the Passenger Name Record number (Booking Number). It can't be
  empty.
  @param updateType
  an {@link UpdateType} object that represents the kind of
  status update of the flight. It can't be null.
  @return a builder for the response.
  @see <a href=
  "https://developers.facebook.com/docs/messenger-platform/send-api-reference/airline-update-template"
  > Facebook's Messenger Platform Airline Flight Update Template
  Documentation</a>