假设你是李华，你的美国老师Miss Morgan要求你们明天下午去听一个美国历史的讲座。你因故不能参加。请你根据以下要点，写一封短信向Miss Morgan请假。
内容要点：
*表示歉意  
*理由：去机场接人  
*询问：是否有录音，以便补听讲座
注意：
1. 词数：100左右  
2. 可根据内容要点适当增加细节，以使行文连贯
Dear Miss Morgan,
I am so sorry                                                                                 
                                                                                           
                                                                                           
                                                                                           
                                                                                           
                                                                                           
                                                                                           
                                                                                           
                   
Yours sincerely
Li Hua