Match opening and closing remarks

Opening remarks

1. I am writing with regard to a disappointing flight I had with your airline.
   [A|B|C]
2. I am writing to complain about the appalling treatment I received at your restaurant last week.
   [A|B|C]
3. I am writing to express my extreme dissatisfaction with a camera I recently ordered from your website.
   [A|B|C]

Closing remarks

A. Therefore, I must insist on a written apology from the manager.

B. I demand an immediate refund for the item, or I will be forced to take the matter further.

C. I look forward to your reply explaining the reasons for such poor service.