Write a letter to your friend expressing your inability to attend the dinner being hosted by him.
26/1 Karol Bagh,
Oct. 6, 20……
Dear Manjit Arora,
Thank you very much for your dinner invitation. I would have loved to be present with you at the dinner. But I am sorry to tell you that I am leaving for Mumbai tonight on an urgent piece of work.
Therefore I won’t be able to join you.
With deep regret,