So my friends dad just left her and her family?

Okay so my friend's dad just left her and her family becuz she was laughing too much and woke him up. he was lying on the couch drunk. my friend and her mom tried to convince him to stay but my friend's sister didn't do anything since she hated him. today it was my friend's first communion and the dad left the church to get wasted. so now he just left her and her family with a pack of beers. what should i say to comfort her?