code: private String trimOutputSpeech(String outputSpeech) {
          if (outputSpeech == null) {
              return "";
          }
          String trimmedOutputSpeech = outputSpeech.trim();
          if (trimmedOutputSpeech.startsWith("<speak>") && trimmedOutputSpeech.endsWith("</speak>")) {
              return trimmedOutputSpeech.substring(7, trimmedOutputSpeech.length() - 8).trim();
          }
          return trimmedOutputSpeech;
      }
docs: Removes <speak></speak> XML tag in speechOutput
  @param outputSpeech output speech
  @return trimmed output speech