Suppose you are Li Ming. During the week-long holiday, you joined a package tour organized by a travel agency to the city of Beijing. But when you got there, you found the services provided for you rather disappointing. Then you decided to writer a letter to the General Manager to 1) state your purpose of writing, 2) complain about the services, and 3) make some suggestions. You should write about 100 words. Do not sign your own name at the end of the letter. Use "Li Ming" instead. Do not write the address.