Cover letter

I need to write a professional letter in order to get a summer job. I would like to ask you for a quick look at my letter and suggestions about mistakes and things that could be improved. I hope it will not be a problem for you as for native speakers. I will appreciate any piece of advice.
Dear Sir / Madam
I am interested in the possibility of participating in the internship program organized by your organization. My main goal and a plan for the nearest future is to become an intern in an American company. Hospitality is a career option I would like to explore and I would like to improve my qualifications in this field, therefore I am particularly interested in working in the hotel, however, if possible, I will consider any available profession related to guest services. As you can see in my resume I have previous experience working in a hotel for more than two years. Most of the time I have been working part-time as a front desk clerk in one of the most popular hotels in my home city. I have chosen this position because it mostly depends on interaction with people and it gives me an opportunity to become familiar with the sort of business I like. Last year I managed to get a job in a beachfront resort hotel in Ocean City, New Jersey.

It was an unforgettable experience. I used to work there as a bell person, which gave me a great deal of experience and knowledge about American hospitality and customs. I enjoyed working in an English speaking environment, getting to know other cultures and lifestyles and practicing my English at the same time.
In my opinion, being friendly and outgoing but still remaining professional with guests and co-workers is the most important thing and a smile can do wonders in overcoming the most difficult situations. I possess a personable, customer service attitude along with friendliness and enthusiasm. My friends say I am energetic and full of good ideas, helpful and sensitive to the needs and problems of others. Moreover, I am a person with a great deal of international experience, hard-working, courteous and willing to learn. That is all why I think I will meet the expectations of any employer.

Thank you for your time and consideration. If you require any further information, please do not hesitate to contact me. I can be reached at the above address or by telephone or e-mail as listed on my resume. I look forward to hearing from you.
Sincerely,
PS: I enclose two most recent reference letters and the TOEFL Score report as proof of my English abilities. The other reference letters are available upon request.