How to attach a cloth to TPS character

Hello,

I am trying to attach a flag to a third person character in which that when he moves the flag moves with him. What I did is that after I made the cloth(Flag) I dragged it and put it in hierarchy view with the Player object. But when I run the game, the flag doesn't move with the player, it just stays where it is. Do I need to write some code to make it work?

Thanks.