Check the conditional patterns! "What do you say when you meet your ex in another country?" (zero conditional) I say, "you again!" "What will you say if you meet your ex in another country?" (first conditional) I'll say, "I knew we'd meet again!" "What would you say if you met your ex in another country?" (second conditional) I'd say, "What a huge surprise! I didn't expect this at all!" "What would you have said if you had met your ex in another country?" (third "monster grammar" conditional) I'd have said whatever I wanted. It's a complete flight of fancy anyway.

i say"hola,como estas?":D

Hi Peachey!

you are so nice to people around you~~

It would be polite to say hi.