How do I get older guys to sleep with me?

I(19 M) am kinda new to datting apps. Im really into people my age as much especially because they are really desperate sometimes. With that older guys are also a lot harder to get and keep chatting I find. They are more picky and I have my own boundries which I stick by which sometimes causes them to stop chatting. How do I talk to older guys or what can I do to make them want me more?