He was immediately sentenced. Ghavami must also register as a sex offender.
Prosecutors say Ghavami offered to give the 18-year-old victim a free belly chain.
Prosecutors say he put his hands around the woman's waist as if placing the chain on her, and then put his hands down her pants.
The woman left the store, called her family and then notified police.
City News Service and the Associated Press contributed to this report.