You ve received a letter lucy, your british pen friend

You received a letter from your English- speaking pen friend Patricia who writes ; 

...All in all , my birthday party was great! However, one of my friends came to the party in CASUAL clothes . Just jeans and a T- shirt ! Of course I didn't say anything. But she felt a bit left out. I was really sorry for her! And what do you usually wear when you go to a birthday party? Is it important in Russia to wear smart clothes at parties? What would you do if you were me ? 
I've got to go now as I have LOADS of homework to do. DROP me a LINE when you can . 
Write a letter to Patricia . In your letter 1) answer her questions 2 ) ASk 3 questions about her birthday party