chat in game

hi everybody, hope this is the right place. I am new to xbox and fm7 one week. In game how do chat with people in game (I see may not work at times) if things are working right where in game does this take place. yes I have head set. I have tons of ?. I love this game. Been playing asphalt 8 for3 yrs

If your in multi-player, make sure your headset is set to game chat.