Lolwut?

So I'm trying to pick out what they're saying from context, and this is what I've got, with some extra spaces .

扶桑：大丈夫山城 瑞雲祭りは私達大トリよ？
山城：扶桑お姉さま大丈夫です、落ち着きましょう！

I made a rough go at it, but I'm not confident in my parsing of their panic text or the details of my translation.

Edit: heh, I guess I don't know how translation mode works very well. Now my notes are added for real.