Letter

Hi James!
I'm writing you for say you that the party of yesterday was amazing! Thank you for the invitation. I enjoyed so much.
I have two invitations for the match of today on Central Park. Do you want to came with me ?
Kisses!

This is a good attempt, the meaning is clear.  However, it would be better with these changes:

Hi James!
I'm writing to you for  to say you that yesterday's the party of yesterday was amazing! Thank you for the invitation. I enjoyed it so much.
I have two invitations for the match of today on at Central Park. Do you want to came come with me ?

Let me know,
Kisses! Bye,

Cristina

xx

In English we don't sign off from our letters with kisses - we can put xx at the end, which means kisses.

Hope this helps,

Annie

Letter

Hi James!
I'm writing to you for tell [or you can say: "to let you know that] you that the party of yesterday was amazing! Thank you for the invitation. I enjoyed it so much.
I have two invitations for the match of today on Central Park. Do you want to came with me ?
Kisses!

Good job Cristina! :)

Letter

Hi James!
I'm writing you for say you that the party of  Yesterday's party was amazing! Thank you for the invitation. I had a great time I enjoyed so much.
I have two tickets invitations for today's match? the match of today on at Central Park. Do you want to come with me?
Kisses