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Delta Air Lines is pulling napkins from its flights and the Coca-Cola Co. is apologizing after their attempt to spark romance in the air didn't take off.

In a partnership with Diet Coke, the airline had been distributing drink napkins that encouraged passengers to slip their number to their "plane crush."

"Be a little old school, write down your number and give it to your plane crush. you never know," reads one side of the napkin. It goes on to read in big font next to a Diet Coke can, "because you're on a plane full of interesting people and hey ... you never know."

It was not immediately known when Delta began distributing the napkins, but they began pulling them last month after being criticized on social media.

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Napkins received from @Delta on Wednesday flight seem unintentionally creepy, especially after reading the smaller print. Swing and a miss, @DietCoke. pic.twitter.com/eKaMruqqUR — Mike J (@MJJoe) February 1, 2019

"Napkins received from Delta on Wednesday flight seem unintentionally creepy," one male user wrote on Twitter. "Swing and a miss, Diet Coke."

Another passenger echoed the sentiment on Twitter: "Pretty sure no one appreciated unsolicited phone numbers in the 'good old days'."

But others found humor in the advertising strategy.

One woman posted a photo of the napkins on Instagram, with the caption, "These are adorable!"

She goes on to explain how she previously found love on a plane, and another woman thanked the airline company for "helping us single out!"

Even ex-Arkansas governor Mike Huckabee, a former Republican presidential candidate, chimed in, tweeting, "Dang! That's why so many flight attendants and nice looking women kept giving me napkins on my Delta flight."

In a statement to NBC News, Coca-Cola responded to the criticism with an apology and said it is working with Delta to remove the napkins and replace them with other designs. Delta echoed the company's response saying they "missed the mark with this one."

This is not the airline's first run-in with controversy. In November 2018, a flight attendant for the airline questioned a black doctor's credentials after she offered to help a passenger who needed medical attention. Less than two weeks ago, Delta agents were accused of refusing to communicate with two passengers who are deaf.