You missed a flight due to a problem at the airport. Write a letter to the airline. In your letter
Describe what happened that caused you to miss the flight Explain how missing your flight affected you
Make it clear what you would like the airline to do.
Dear Sir or Madam,
I am writing with regard to a flight that I missed due to a mistake by one of your employees.
Two weeks ago I was due to catch a flight to Rome, where I intended to spend four days on holiday. Unfortunately, the attendant at the check-in desk gave me a boarding card for a different flight, and I did not notice the mistake until I arrived at the departure gate and it was too late.
As a result of the error, I was not allowed to board the flight to Rome, and this caused me great inconvenience. I had to book a new flight two days later, which meant that I missed two days of my holiday and I spent an extra 2200.
As the mistake was caused by your company, I hope that you will compensate me for the cost of the additional flight, as well as for my taxi fares to and from the airport.
I look forward to receiving your response.