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Will you be purchasing the ticket through a travel agency?
So far, there is nothing for her (or him - this might be a male) to gain by your sending a non-refundable ticket.
However, for this type of scam, the next step is for this person to start asking you for money other things, such as money for a passport stamp, or money for the embassy. You will be told the ticket cannot be used unless these other expenses are also paid.
I think this is what you wanted to know. If not, please let me know.