First-time Flyer

Mallu boarding a plane.
Air hostess is smiling.
Mallu: Tatti Vandi!
Air hostess (shocked): What???
Mallu: Tatti Vandi!!!
Air hostess calls steward.

Mallu: Tatti Vandi!!!
Steward: What????

Mallu thrusts his boarding pass below the steward's nose.

Steward looks at it and bursts out laughing. Composes himself, and says: Sir, seat 31 D is in the center. This way please!