How can I act like someone who frequently flies?
Assuming the object of your performance is the flight attendant
There's no need to pretend in economy class; frequently flying economy only means you're just a flying wage slave
No need to pretend in business class; the less you understand, the more problems arise, and the more the flight attendants are forced to interact with you
If you have to say something, just hold it in if you feel motion sick and don't throw up