I'm flying from Bangkok to Berlin in about a week and the journey has 3 legs:

Leg 1: Bangkok to Kuala Lumpur
Leg 2: Kuala Lumpur to Istanbul
Leg 3: Istanbul to Berlin

Leg 1 had a different PNR then legs 2 and 3 (which have the same). Because of unforseen circumstances I would like to skip leg 1 of the journey because I will already be in Kuala Lumpur. Will this be possible since this leg has a different PNR or will the airlines cancel legs 2 and 3 since I didn't show up for leg 1?