假设你是李华，你参加了某旅行社组织的一次旅游，你对其中的某些服务不满意。所以，你想就此事给该旅行社写一封投诉信。
内容包括：1.写信目的；2.不满之处；3.表达期望。
注意: 1. 词数100左右；2. 开头和结尾已经给出，不计入总词数。
Dear Madam / Sir,
My name is Li Hua, who is a customer of your travel agency. ……
Yours sincerely,
Li Hua
Dear Madam / Sir,
My name is Li Hua, who is a customer of your travel agency. Here I'm sorry to express my dissatisfaction with the service of your travel agency.
First of all, during the trip the tour guide not only introduced too many a
