our friend invited you to go with him/her to a concert next week, however, you are unable to come. Write a letter to your friend. In your letter let your friend know why you can't go to the concert; suggest another activity you can do together; explain why you think your friend would enjoy this activity.

Dear Lena, I hope you are doing well these days. I’m writing this letter for you due to the fact that I will not be able to make it to the concert next Friday. I know that I promised you that I would be there, but suddenly a number of occasions required me to head […]