Many airlines offer passengers meal vouchers when there is a flight delay that caused you to miss a meal time. That’s what I got when I was told that my flight was delayed 4 hours (turned out to be 5). But it’s not a physical voucher. It’s my own boarding pass! Really? The catch is to use it on the air side, the restricted area after you passed through the immigration.  I was told that my Boarding Pass was a HK$75 vouchers and I could use it at any restaurants. In Hong Kong International Airport, HK$75 can’t really get you whatever you want. I wanted something simple, so I went to Tsui Wah, a pretty well known local casual restaurant, in the fast food area. There was a long line and I started to queue up. Then I spotted an Airport Staff standing around to assist the passengers. Just want to make sure, I told her my flight and showed her my boarding pass. Her immediate response was: “Is this a meal voucher?” and said that the restaurant wouldn’t accept…