Macbook Pro flashing folder with question mark

I have a Macbook Pro 2016 model. When I tried turning it on, all i see is a black screen with a flashing folder with a question mark on it. I pressed and held cmd + R to start in recovery mode, checked the disk utility and then reinstalled the OS, twice. Sometimes it will go away and I can use it just fine, and then randomly when it sleeps or when im not using it the folder will show up again. Its very frustrating. I dont know what else to do to get rid of the problem completely. There are other times i go into Recovery mode again but i am not able to reinstall the OS again because nothing shows up to select.