Dear Aman,
I hope you are doing well. I am writing to formally express my concern about the book I have taken from you to read. You know that my cousin was to come to my home to spend some quality time with us. On that day, I was reading the book that I borrowed from you while having my coffee, and my cousin was so excited to meet me after a long time. To surprise me, he came to my room quietly just to scare me, therefore that coffee spilled on that book mistakenly.
I am very sorry for this incident. I am taking full responsibility for this, and I will try to pay for this damage as soon as possible, or else I can purchase a similar book on my cost for you.
I hope this damage will not affect our friendship. I will wait for your prompt reply
Thanks in anticipation,
Best regards,
ABC
