Dear Anna,
Hello, how have you been? I haven't heard from you since our last Christmas party. It's been a long time. I hope you're doing well in school. I know it can be tough taking Calculus and Physics, but you'll be fine.
Three will be English for Thai Student conference next week at Grand Sheraton Sukhumwit Hotel. I would like to invite you so we can discuss our current situation in Bangkok. I've also included your invitation and ticket in this envelope. Please attend the first three sessions so we can have some time to hang out during the sessions.
Let me know if you're coming or not. Please give me the good news!
Miss you,
BOY