lets not get into a debate, however you cannot have private conversation with a non mehram women. I should have emphasized on the private conversation part. He is a link explaining my point of muslims not talking to girls before marriage:-
http://www.islamhelpline.net/node/7998
IRCC does make cultural allowances for arranged marriages in terms of genuineness, relationship proofs etc. However, even in arranged marriages, the couple generally at least meets and talks before the wedding. Having zero contact beforehand is a red flag.