希望对考生有帮助
going to open a repair shop in your city at that time, we are sorry that we shall not be able to come. We hope to see you on some future occasion. Yours faithfully
尊敬的先生/小姐，
非常感谢您邀请我们参加1997国际商品交易会。由于我们将于同一时间到你市新开一家维修店，非常抱歉我们不能前去。
希望以后在某些场合见到您。
您诚挚的