what should I respond when someome says 'whats up'?

He's a conman You guys meet each other from a dating App. He's from a different country. He says you are beautiful and wants to know more about you. After introducing youselves to each other, he askes you if you are single or have any serious date. You tell him no. Of course that's why you are on a dating App. He tells you how surprised that a wonderful woman like you is single and how lucky he is because he meets you here. He asks you lots of questions about you likes and dislikes shows that he's really interested in you. He says things to compliment you make you think he's a nice person. He asks if you can give him a chance to know each other. You say ok, considering to give yourself a chance to know others too. Then he may text you or call you everyday. He finds every way to make you grow into him. When he thinks you do like him, he offers to visit you. Everything seems normal so far until he takes that fligt. Soon you get a call from him claiming he has some problems with the immigration officer. His bagages are taken, left with only a phone to contact the person he's visiting. He's accused of money laudry because he takes a lot of cash with him to buy gifts for you. Then the so called immigration officer call you to 'confirm' the fact that he's coming to visit you. You say yes. The ‘officer' tells you that you have to pay a certain amount of money for the fine to free him from being arrested. It has to be you because you are the one he's visiting. If you feel guilty and pay the 'fine', you are swindled sis. If you ignore them, thing might get a little more interesting. He cries why you abandon him like that or begging you to save him out of this mess, promising giving back the money as soon as he meets you. The 'officer' claims he'll be arrested if you dont make the payment. He may threaten to arrest you too if you give him your address. Well...they are a good team, just not good enough..hahahahahahhahahaha...