only home team can change game and unlike what above said it cost 2 tokens, that being said he`s not much of a friend to arrange a match 15 after your game let alone 15 before so i would ask if he`s a friend to arrange a better time that` suit`s both, if not that much of a friend un-friend them, also if you can cancel friendlies IF enough time just go to your fixtures, it will cost nothing to cancel friendly