Dear Lindsey,
My deepest apologies for not making it to our planned lunch date on the 14th of October. Frankly, it completely slipped my mind as I have a lot on my plate currently. I was completely occupied, and I forgot to mention that I had a conference to attend, prior to making plans with you. Once I recollected the same, I felt extremely bad for not informing you. I would like to make it up to you by taking you out for dinner on the 18th of October, my treat. Requesting your forgiveness for my absent-mindedness and forgetfulness. Hoping to meet on the 18th.
Yours Truly,
Anabel
