Programmable Messaging

const accountSid = process.env.TWILIO_ACCOUNT_SID;
const authToken = process.env.TWILIO_AUTH_TOKEN;
const client = require('twilio')(accountSid, authToken);

client.messages
  .create({
     body: 'You have an appointment with Owl, Inc. on Friday, November 3 at 4:00 PM. Reply C to confirm.',
     messagingServiceSid: 'MGXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX',
     to: '+15558675310'
   })
  .then(message => console.log(message.sid));

const MessagingResponse =
  require("twilio").twiml.MessagingResponse;

  app.post("/incoming-message", (req, res) => {
    const twiml = new MessagingResponse();
    twiml.message("Thank you for confirming your appointment.");
    res.end(twiml.toString());
  });