I want to create an android app that sends reminders to be outputted on the Amazon Alexa speaker and uses Amazon Web Services. Firstly, is this possible? Secondly, I know that I can create skills for these reminders, but then how can I invoke the skill with information just sent from my app at a specific time? I don't want to invoke the skill through voice from the speaker, but rather at a certain inputted by the user from the app. I'm not sure how I would do this. Any guidance would be appreciated.