Dear A,

I am excited to write this invitation to you to formally invite you to my next birthday party, which will be held on 21/2/2022 at my 5:00 PM at my house.

We will have plenty of pizza, soda, chips and other snack foods, as well as an awesome laser tag tournament. In addition, we will have some incredibly delicious ice cream cake at the end.

All expenses are paid -- just come to the party and have a great time celebrating my birthday with me.

It'll be a lot of fun; I hope you make it!

B

Dear A.
Are you free on monday? If you are free, please come to my birthday party. The event takes place (your birthday) at 5:00 pm at my house.
There is a lot of food and games here. Anyway, this is my birthday, so be free. The food is already paid for, don't worry. Your job is to come to my house to play.
Hope you will arrive on time.
Your sincerely,
      B