Invitation-2 ~ E-mail writing

Declining an invitation
Unfortunately, I have some prior engagements this weekend.
Thanks for asking me, but I am going to be in India at that time.
I’ll call you when I get back and hopefully we can get together then.
I’d really like to come, but I have some other plans.
I really wish I could go with you, but I promised to help my friend move on Saturday.
If you’re free, maybe we could get together sometime next week instead.
Unfortunately, I have to work overtime tomorrow night.
This week is pretty hectic, but I’m sure we can find another time to meet soon.
I would love to attend, but my relatives are coming in from out of the town that day.
I’m going out to dinner for my dad’s birthday that night.
I should have a lot more time as soon as I finish writing my thesis.
We’ll find another time to get together soon though.
Thanks for the invitation all the same.
Thanks for inviting me anyway.

e.g
Dear Leo,
Golf on Saturday morning sounds great. I just got a new set of clubs last week, so this will give me a chance to break them in. How about meeting at the usual place at 9:00? If you’re not doing anything afterwards, let’s have lunch after our game.
See you Saturday,
Daniel