India, March 1 -- A female passenger on a nine-hour flight was left stunned after returning from the restroom to find a mysterious note on her seat with an unexpected request.

"Went to the bathroom on a 9-hour flight, came back to find this," she wrote in a Reddit post that has since gained significant attention.

The anonymous message, written on a piece of paper, simply asked, "Hey, can I get your number?" However, the sender did not leave the own contact information, making it impossible for her to respond even if she had wanted to.

"I'm still bemused by this because the note-giver did not reveal themselves, so even if I DID want to, I had no way of doing so," she explained.

The woman, who had been seated in an aisle seat next to an...