My recommendation is this
(If you truly won't see them again)
Don't go for a goodbye kiss
It might cause confusion or pain
And though it's better not to be rude
However British you may be
A handshake is never appropriate
(unless at the Ritz, having afternoon tea)
(dedicated to my 26/01/17 date who shook hands to say goodbye)
©cih17, 26/01/17