Helping someone having a Panick attack

Hi! I’m looking for some advice on this topic.
I believe my partner has panic attacks and I would like to do everything that is in my power to help him during these situations.

They have occurred 3 times only. He starts feeling lightheaded, his legs are weak and his body shakes a lot, like if he was freezing but I don’t see any discoloration on his body and lips are their regular.

Last time it happened we were more prepared and I sat down with him and grabbed his hand. I kept reminding him that everything was okay and that I was there for him.

I tried to keep his mind focused on something else, asking him about his games but he was more focused on breathing and licking his lips a lot.

What else can I do for him?