出差或出访，常常需要事先预订酒店、会议室或者飞机票等等，这类信主要包括以下内容：
（1）请求预订并说明原因；
（2）请对方答复并进行确认。
通常预订后都要进行确认回复，说明是否满足预订要求，如果不能满足要说明原因。
例如：
（1）Subject: Reservations for a Flight
Dear Sir/madam,
Mr. Zhang Xiaohua, our Marketing Manager, would like to fly from Guangzhou to London on the earliest flight possible.
We would be obliged if you could book one economy class seat for him on a flight leaving Guangzhou on or about July 28.
Bank of China has been instructed to pay the fare and the booking fee, and we would ask you to submit your account directly to them.
We appreciate your early confirmation.
Sincerely yours,
Lin Jie
Secretary to Mr. Zhang
Guangzhou Trading Company
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