I figure the about $2 or if more than 1 $5. I think that is fair as they are doing me a favor of finding access to the internet and printing out the boarding passes. This would cost way more than $5.
I usually carry $5 Dunkin Donuts gift cert here in MA I keep in my pocket book for those occasions when someone goes out of their way for me. IE helps me put something heavy into my car. Or checking the air in my tires. I am not that old but when I bend over I get Vertigo very bad. I have had strangers help me put my groceries in my car. they then take the carriage and put in the carriage space. I must look like I need LOTS of help No these people are just passing by and help they dont work at the stores. Last year when my DH was away on vacation camping. My Next door neighbor mowed my grass and put out my trash. I am only 46 not that old or crippled. I really appreciated it as I almost missed the truck.