What does Lenina say during the flight with henry that demonstrates she is a true product of conditioning?

From the earliest age, Lenina has been conditioned to despise those beneath her in the social pecking order. In this "brave new world," the lower orders are recognizable not just by the relatively menial work they perform but also by the clothes they wear. Deltas, for instance, wear khaki, whereas Epsilons wear black.
Lenina and Henry are flying past the television factory, where the workers are just finishing their shift. The workers are from the supposedly inferior Delta and Gamma castes, and Lenina, being a member of the more elite Beta caste, instinctively looks down on them. She unthinkingly reveals that she's very much the product of social conditioning when she casually remarks to Henry that she's glad she's not a Gamma. Lenina has no real awareness of what she's saying; expressing such prejudice has become second nature to her.