Kansai ben?

Hi me and my partner were in osaka in October from the uk.

On the shjnkansen I told her. Oh in osaka they don't say arigatou gasaimas. But say okini,
She was like ohhh interesting. So she said it to 5 different employees. Wh ok all responded with arigatou. And called me a liar and how I was pranking her.

I am guessing that kansai ben quite rare now .

So locals please tell me how it is

by jetter10