To handle the surge of complaints, the Santa Clara County District Attorney’s Office set up a fraud hotline in Vietnamese and English for customers bilked by a San Jose travel agency. Sunlight Travel, founded in 1996 by Diane Ho, suddenly closed up shop June 5, leaving customers in a lurch. Many of them stand to lose thousands of dollars for flights bought but never booked. Sunlight Travel catered to a lot of Vietnamese clients from its now-closed strip mall storefront on South King Road.