Roshanp

I am from nepal.now i work in uae.i want to marrige with thailand girl.i want to coat marrige in kathamandu nepal.my dirstrict is east of nepal sunsari i want to go leave vacation 1 week for only coat marrige.what kinds of paper i need and for my girl friend .men (nepal) girl(thailand).please kindly request help me and advice me .thank you. My name is roshan