The story of the movie is about a man and a woman who meets on a train and they open a conversation and after each one reaches his stop they leave without giving their telephone numbers.

Then the guy try to find a way to find this girl, by placing ads everywhere about what she said on the train and he starts reciecing thousands of calls from thousands of girlsm of course his friends started to help him too to look for this girl, and at the end they meet again in the train station.

By the way, they both don't know anything about each other (no name, no number, no address, nothing)

Anybody please can help.

Could it be "On The Line"?

Oh my god, thank you so much, thank you