Нужно ответить на письмо it’s my parents’ 20th wedding anniversary next week. do you think i should organize a celebration? have you ever organized anything like that? we could have a party, or go out for a meal, or maybe do something else. what do you think would be a good idea? love, maxine

Hello,Maxine. 
First of all my congrats with wedding anniversary! Thats a big attainment!
In my opinion idea with restaurant will be good. You can book a table in Italian restaurant, prepare menu, choose a good wine and asked for a live-music. Moreover try to find little fireworks and make a surprise at the end of the dinner.
I hope everything will be great! Enjoy it!