It would be a romance scam no matter what kind of reasons she/he may has to ask for money from you.
Think twice before you send dollar to him/her and ask yourself “Why should I send the money?
The scammers choose chat rooms and dating sites because the person in love offers the chance of the biggest payoffs.
The Nigerian dating scams are often not easy to detect as the scammers are often highly educated, have exceptional patience and they do their homework!
However, other wiser scammers fake themselves by using ordinary photos to make their profiles more real.