根据提示写一篇英语短文.要求：条理清楚,内容连贯,不少于60词.
提示：你的一位美国朋友Mark要到北京旅行.你写信给你的好朋友马林,向他介绍Mark,并请他5月3日上午8点到机场（airport）接Mark,给Mark当导游.
Name Mark
Looks tall,short brown hair,blue eyes
Character outgoing
Hobbies singing,playing sports
开头：
Dear Ma Lin,
Long time no see.How's everything going?I'd like you to help me._________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Tom