(CNN) Maybe Delta should stick to flying planes instead of playing matchmaker.

After handing out Coca-Cola napkins suggesting passengers give their name and number to their "plane crush," both companies are apologizing.

It started with 33 words on napkins advertising Diet Coke:

"because you're on a plane of full of interesting people and hey ... you never know," the front teases.

The back nudges further, emitting a shocking amount of peer pressure from a paper square:

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