[
    {  "name" : "AA",  "full_name" : "AABB",  "slack_name" : "aabb"  },
   {  "name" : "CC",  "full_name" : "CCDD",  "slack_name" : "ccdd"  },
   and more...
]

//require
var Alexa = require('alexa-sdk');
var slackjson = require('./slack.json');
var namejson = require('./name.json');
var rp = require('request-promise');

var firstHandlers = Alexa.CreateStateHandler(STATUS.FIRSTMODE, {
    "Unhandled": function(){
        ...
    },

    "GetAnswerIntent": function (){
        ....//約束のある方
    },

    "GetAnswerFromStudentIntent": function (){
        studentRequest.call(this, false);

        rp(options).then((response) => {
            this.emit(':tell', '担当者に伝えました、少々お待ち下さい');
        }, (error) => {
            this.emit(':tell', '通信失敗しました,もう一度お願いします');
        });
    },

    "GetAnswerFromDeliveryIntent": function (){
        ....//配送業者
    }, 
    "AMAZON.StopIntent": function(){
      this.emit("stop");
    }
});

function studentRequest(frist) {
    var to_user_message = "<@slackid>　面接の学生がきました。"
    options = {
        method: 'POST',
        uri: slack_webhook,//先のslack_webhook
        body: {
            text: to_user_message
        },
        json: true
    }; 
}

    "GetAnswerFromStudentIntent": function () {
        studentRequest.call(this, false);
        rp(options); //ここでpost
        this.emit(':tell', '担当者に伝えました、少々お待ち下さい');
    },