I have a half-fare card for Switzerland but when I book a ticket zurich-milan here, I cant include this option?!
A half-fare card means that I get 50% off of all trajects in Switzerland. According to the man at the counter of Zurich HBf, this also works for tickets I book with trenitalia. But when I try to book a ticket here online, say zurich-milan, I cannot include this option in the search result, hence I wont get the 50% discount on the Swiss traject. How can I do that?