I am unsure of how to change between each screen of my app, I don't know how this can be best implemented. I am currently creating a custom skill which is a productivity app specifically focused on monitoring and analyzing general health and tracking daily activities. I thought about creating an interaction model for this but there would be nothing that could be used as a slot parameter I think. Would this be done within the multimodal responses section entirely? Ideally, I'd like to have it made in such a way that the user says "Alexa, bring me to the Registration Screen" and the screen will automatically move from my default Login Screen I made in APL to it. I am new to development so any tips or suggestions would be much appreciated.