Your correction and comment are appreciated

Can any teacher help me correct my essay? Thanks! Dear Mr. Smith, It is kind of you to have accepted my invitation to dinner with me this Saturday evening, but I regret to tell you that I am unable to keep my promise due to an unexpected accident. Last Friday, Li Ming, one of my roommates, was badly hurt in a car crash and is now receiving treatment in hospital. As his friend, I must keep him company for a couple of days because there is no one else available. I am afraid I have to cancel our appointment. I do apologize for the inconvenience my cancellation may cause. Honestly, I have long been appreciating your help with my English and expecting your honor of dining with me. Now given the unexpected time conflicts, can we make it some other time, say, next Friday evening? Please feedback whether you have prior commitments so that I can make appropriate arrangements. Looking forward to your early reply.