Dear ......,
I am very happy to give you an invitation for my birthday party. This occasion will take place on the next saturday evening, 17th of March, and everyone in our class will show up. This is going to be a themed party where everybody dresses like characters from fairy tales such as princes and princesses, and I hope you find this idea interesting. The party will be started at 6pm,but I hope you can make your visit a little bit early so we can help each other to complete our costumes.
Contact me if there is any chance or inconvenience
I am looking forward to hearing from you soon
Sincerely,
...........
Chúc bạn học tốt