I have a question re advance seat selection on codeshare flights. In the original booking, there were 2 flights: one with CX and another with JL (same booking reference for both CX and JL). Then I decided to change the dates for both flights to later dates (TA said no fee involved in changing dates). TA found 2 seats on CX with a new date, but could only find 1 seat available on JL for another new date. However he could find 2 seats on the same JL flight under AS codeshare. I agreed to book under AS codeshare flight, and did not realise that the seat selection for codeshare flights was a real nightmare. AS codeshare booking has a link to JL (and JL booking reference) for seat selection. However that link did not work. I have posted a question on this in the JL forum and got one reply confirmed that "Seat selection on AS codeshare has been a mess for a while by now. Basically, you can request window or aisle. That's about it in advance." Somewhat disappointed. Contacted AS who said they are not operating carrier, so could not help. Contacted JL who said booking ticked with AS, contact AS !!
Another problem was that when I tried to 'manage booking' in JL website, it said reservation cancelled / could not be found TA said he did not know why that should be ..
If I could not find the booking in JL, then how would I be able to do online checkin for the flight?
Lesson learnt: Will stay away from codeshare flights in the future.