The couple is planning a Sept. 9, 2009, wedding at Broken Arrow, Okla.
Luyen is the daughter of Linh and Nghia Nguyen of LaGi, Viet Nam. Michael is the son of the late Verona Molthan of Le Mars, and the grandson of the late Henry and Iona Beek of Le Mars and Sibley.
Luyen holds a degree in hotel management.
Michael is a graduate of Oklahoma State University with bachelor degrees in finance and accounting.