Hi - I am UA Premier silver, with the UA Explorer credit card. Booked a multi city itinerary on Air Swiss website, so presumably that’s Air Swiss/LH ticketing for the whole itinerary? Flights are outbound IAD to MUC on LH operated flight (UA code share), then return is ZRH to IAD on a UA operated flight (with LH code share). Can I get free bag traveling Economy basic on the ZRH to IAD return? Flight is UA 53, also is confirmed under a United booking reference number.