I have a combined UA-LH-AI ticket with a DEL-CCU-DEL sector on AI that has been nothing short of a nightmare. Multiple schedule changes, flights disappearing from the ticket etc. I have probably spent 5-6 hours talking to my TA and LH to keep the itinerary alive. Now I see that AI is not selling tickets anymore for my AI401 on January 24. Does this flight still exist or do I need to pick up my phone again?