code: function dispatch(intentRequest, callback) {
      // console.log(JSON.stringify(intentRequest, null, 2));
      console.log(`dispatch userId=${intentRequest.userId}, intent=${intentRequest.currentIntent.name}`);
  
      const name = intentRequest.currentIntent.name;
  
      // Dispatch to your skill's intent handlers
      if (name === 'MakeAppointment') {
          return makeAppointment(intentRequest, callback);
      }
      throw new Error(`Intent with name ${name} not supported`);
  }
docs: --------------- Intents ----------------------- 
  Called when the user specifies an intent for this skill.