Business Writing_Requesting a letter of Recommendation

Dear Professor Chen,

Thank you for your attention. I am writing to request a letter of recommendation from you. I took your C# Programming, during the Spring 2009 semester. Then, During the Fall 2010 semester, I met with you bi-weekly to discuss my final thesis.
I hope that you feel comfortable writing a letter of recommendation for me, I appreciate the time and effort that it will require.

Thank you again for your time, Please fee free to contact me for any reason at vivian@gmial.com or +886 (2) 26001234.

Yours truly.
Union Wang