Dear John:
I'm your friend called Li Ping.our school's english club will hold an english night party for us, i'm very glad to invite you to come with me!
Now let's tell you something about the good party!it'll start at 7:30 p.m in 15th April at our english club,we can communicate anything we want one another in english and what's more We can also have a good time by enjoying the performances acted by diffrent classes.during the party we can make friends and exchange our gifts one another.lastly.if you want you can bring here the food you like and we provide drinks ,too!
finally I believe we can have a great time that we'll never forget !
中间一些名词你改改就得了。