Write a note of about 50-60 words based on the following situation:
The winter vacation was over, and you came back by train yesterday. Your friend (Michael or Lucy) went to the railway station to meet you and helped cleaning your dorm. Now, write him/her a note, expressing your gratitude and offering your help in return.
note, express your gratitude, offer to help
2. 之后说明写信目的，表达自己的感激。（Thank you very much for your…/ I would like to show my gratitude for your…/ I am very grateful for your...）
3. 表示自己十分愿意回报他们。例如I would really appreciate it if I could return your help some time. If you need me, just feel free to give me a call.