.js

controller.on('conversationStarted', (bot, convo) => {
  console.log('A conversation started with ', convo.context.user);
  // Map the convo when it starts with the proper user
  // and set `quote_completed` to false. This is useful for
  // resuming a quote. This is set to true with convo.on('end') callback
  if (convo.status === 'active') {
    const usersPublicProfile = 'https://graph.facebook.com/v2.6/' + convo.context.user + '?fields=first_name,last_name,&access_token=' + process.env.page_token;
    request({
      url: usersPublicProfile,
      json: true // parse
    }, (error, response, body) => {
      if (!error && response.statusCode === 200) {
        event.firstName = body.first_name;
        event.lastName = body.last_name;
        event.emit('update');
      }
    });

    event.on('update', () => {
      const { user } = convo.context;
      const unixTimestamp = Date.now();
      const humanTimestamp = new Date(unixTimestamp);

      msg = {
        id: user,
        quoteCompleted: false,
        convoStartedAt: humanTimestamp,
        humanRequested: false,
        firstName: event.firstName,
        lastName: event.lastName
      }

      controller.storage.messages.save(msg, (err, id) => {
        if (err) {
          throw new Error(err);
        }
      });
    });
  }
});

add the imports:

const EventEmitter = require("events").EventEmitter; let event = new EventEmitter();