Google Apps Scriptでsheet.appendRowができない。

前提・実現したいこと

LINE messaging API、Google apps script、Dialogflowを利用して予約管理システムを開発しています。
GASでsheet.appendRowができません。
下記のパラメータのdateとanyはスプレッドシートに表示されるのですが、それ以外が表示されません。

該当のソースコード

#Google apps script

function doGet(e) {
  var sheet = SpreadsheetApp.openById('xxx').getSheetByName('xxx');  
  var result = {};
  
  if (e.parameter == undefined) {
    //受信に失敗した場合
    result['result']= 'NG';
  } else {
    //受信に成功した場合
    var num = 1
    var date = new Date();
    var currentTime = Utilities.formatDate( date, 'Asia/Tokyo', 'yyyyMMdd: hhmmss')

    var date = e.parameter['date'];
    var name = e.parameter['any'];
    sheet.appendRow([num, currentTime, name,date]);
    result['result']= 'OK';
    
    num++
  }
  
  return ContentService.createTextOutput(JSON.stringify(result));  
}

#Dialogflow fulfillment

// See https://github.com/dialogflow/dialogflow-fulfillment-nodejs
// for Dialogflow fulfillment library docs, samples, and to report issues
'use strict';
 
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');

//httpsの利用を宣言する
const https = require('https');
 
process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements
 
exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
  const agent = new WebhookClient({ request, response });
  console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));
  console.log('Dialogflow Request body: ' + JSON.stringify(request.body));
 
  function namae(agent) {
    return new Promise((resolve, reject) => {
        let context = agent.getContext('hinichi-followup');
      
        let date = context['parameters']['date'];
        let name = agent.parameters['any'];
        let url = 'xxx;
        
        //httpのリクエストを送信
        let req = https.get(url, (res) => {
          let chunk = '';
          //読み込み中の処理
          res.on('data', (c) => {
            chunk += c;
          });

//読み込み完了時の処理
          res.on('end', () => {
            //処理終了
            resolve();
          });
        });
        
        //エラー時の処理
        req.on('error', (e) => {
          console.error(`エラー： ${e.message}`);
        });
    });
  }
  
  function welcome(agent) {
    agent.add(`Welcome to my agent!`);
  }
 
  function fallback(agent) {
    agent.add(`I didn't understand`);
    agent.add(`I'm sorry, can you try again?`);
  }

  // // Uncomment and edit to make your own intent handler
  // // uncomment `intentMap.set('your intent name here', yourFunctionHandler);`
  // // below to get this function to be run when a Dialogflow intent is matched
  // function yourFunctionHandler(agent) {
  //   agent.add(`This message is from Dialogflow's Cloud Functions for Firebase editor!`);
  //   agent.add(new Card({
  //       title: `Title: this is a card title`,
  //       imageUrl: 'https://developers.google.com/actions/images/badges/XPM_BADGING_GoogleAssistant_VER.png',
  //       text: `This is the body text of a card.  You can even use line\n  breaks and emoji! ????`,
  //       buttonText: 'This is a button',
  //       buttonUrl: 'https://assistant.google.com/'
  //     })
  //   );
  //   agent.add(new Suggestion(`Quick Reply`));
  //   agent.add(new Suggestion(`Suggestion`));
  //   agent.setContext({ name: 'weather', lifespan: 2, parameters: { city: 'Rome' }});
  // }

  // // Uncomment and edit to make your own Google Assistant intent handler
  // // uncomment `intentMap.set('your intent name here', googleAssistantHandler);`
  // // below to get this function to be run when a Dialogflow intent is matched
  // function googleAssistantHandler(agent) {
  //   let conv = agent.conv(); // Get Actions on Google library conv instance
  //   conv.ask('Hello from the Actions on Google client library!') // Use Actions on Google library
  //   agent.add(conv); // Add Actions on Google library responses to your agent's response
  // }
  // // See https://github.com/dialogflow/fulfillment-actions-library-nodejs
  // // for a complete Dialogflow fulfillment library Actions on Google client library v2 integration sample

  // Run the proper function handler based on the matched Dialogflow intent name
  let intentMap = new Map();
  intentMap.set('namae', namae);
  intentMap.set('Default Welcome Intent', welcome);
  intentMap.set('Default Fallback Intent', fallback);
  // intentMap.set('your intent name here', yourFunctionHandler);
  // intentMap.set('your intent name here', googleAssistantHandler);
  agent.handleRequest(intentMap);
});