I'm an advanced learner but I stopped after a few moments because it's boring. It's asking me questions that you'd ask a beginner (although a beginner wouldn't understand the questions). It just asked what food I like to eat, where I like to travel, whether I like the weather, etc. I have a language tutor IRL and I have found that we run out of things to talk about too. So we often find ourselves just discussing the latest events from the news. I think you should feed fresh conversation topics daily from a data source like the news, localized to the user. There are global news APIs you can subscribe to.