an informal invitation letter

I assigned a letter to my student that invites his friend to a dinner party at his home. He was expreceted to write the letter in informal style.
His letter is:
Hi Joyce,
Haven’t seen you for a long time, how are you? I want to share with a happy thing——I moved to my new home! Our whole family is very excited, so we decide to hold a dinner party Thursday October 4 at 7pm at my new home. If you are free, just give me a call before the dinner.
I hope to see you soon.

Cecily

I made some changes. Could you proofread it and make it informal? Thank you!

Hi Joyce,
Haven’t seen you for a long time, how are you? I want to share good news with you – I move to my new home! I am very excited (the previous subject is ‘I’), and (I think ‘and’ is more natural in terms of logic. What is your opnion?) will throw a dinner party at 7 on Thursday, Oct. 4 at my new home. If you can come, just give me a call.
Hope to see you soon.
Cecily