Write a note of about 50 ~ 60 words based on the following situation: The Students Union is going to hold an English Drama Contest to stimulate students interest in English. You are asked to find a native speaker as the judge and you think Sam, a visiting scholar at your university, is the best choice. Write a note to ask if he has time and tell him some details about the contest, such as the time, place, rules and criteria. Marks will be awarded for content, organization, language and appropriateness.