text: from flask import Flask
  from twilio.twiml.voice_response import VoiceResponse
  
  app = Flask(__name__)
  
  
  @app.route("/voice", methods=['GET', 'POST'])
  def voice():
      """Respond to incoming phone calls with a 'Hello world' message"""
      # Start our TwiML response
      resp = VoiceResponse()
  
      # Read a message aloud to the caller
      resp.say("hello world!", voice='alice')
  
      return str(resp)
  
  if __name__ == "__main__":
      app.run(debug=True)
  