Apologies to friends in Russia. This is an old one:

Passenger boards an Aeroflot Illyushin IL-62. He is seated, the door shuts, the plane starts-up, taxis and then takes-off. Noticeably absent during the flight was the cabin crew. Passenger finally uses the call button and has to attract the FA's attention.

Passenger: Excuse me, excuse me?
FA: Yes...
Passenger: Can I get some service here?
FA: Service? Service? (Astonished look). We just gave you a seat on this plane and now you want service?...