Dialogflow adding dynamic text is not working with promise and async function

I'm trying to use add.agent to take the updated message variable from the uiFx function. However, there is an issue with both the await function and the add.agent together.

var message = "hi"; //test purpose
async function GetCertain_info(agent) {

  console.log("1" + message);
  await uiFx(); *//this works fine in the console.log, and it updates the message*
  console.log("2" + message);
  agent.add("Here are the information on " + message);*//this works when the await uiFx() is removed and the message variable is returned as its initial value "hi"*
}

async function uiFx() {

  var {
    ui
  } = require('./uia.js');

  return new Promise(function(resolve, reject) {

    ui().then((msg) => {
      console.log("Destination Message :  " + msg)
      message = msg;
      resolve(message);

    }).catch((msg) => {
      console.log(msg)
      message = msg;
      reject(message);
    })
  });
}

What seems to be the problem and how to fix it?

Appreciate your help