Edgar writes a letter to Irving to apologize for not being able to attend Irving's upcoming birthday party. Edgar has a prior family commitment on the day of the party that cannot be changed. While sorry to miss the party, Edgar offers to take Irving for beers on another day to make it up to him and hopes Irving understands.

1. Dear Irving
I write to thank you for the invitation to your birthday party
which I think will be fantastic but unfortunately I can not be.
Unfortunately I will not be able to do, because I have a family
commitment that day which is impossible to attend a birthday
party I hope you understand dear friend. However will reward
you with a day to go for a few beers.
I'm sorry but It was very kind of you to invite me, but will not
attend. Hope you a good time at your party excuse me dear
friend. I hope you understand and againanapology.
Bestwishes
Edgar