Using the Bot Framework to send message on the user's behalf

I'm currently attempting to accept voice input from the user, feed it into the Bing Speech API to get text, and pass that text as a user response. I've gotten as far as receiving the text back from Bing, but I'm not sure how to send that text as a user response. I've been scouring GitHub, so any feedback is appreciated. Relevant code is below:

function(session){
    var bing = new client.BingSpeechClient('mykey');
    var results = '';
    var wave = fs.readFileSync('./new.wav');

    const text = bing.recognize(wave).then(result => {
      console.log('Speech To Text completed');
      console.log(result.header.lexical)
      console.log('\n');
      results.response = result.header.lexical;
    });
    }]

Update: Figured it out (sorta). In order to take advantage of sending this user input back, I had to use another card. Within the context of the card, I'm able to use the imBack function