Why was Haymitch conspicuously absent during the early part of The Hunger Games Mockingjay?

Disclaimer: Viewer, not a reader.

At the end of Catching Fire, Haymitch is in the middle of a meeting with Plutorch when Katniss walks in on them. The next we see him is only after Katniss agrees to be Mockingjay, the face of the revolution & shoot some propaganda videos.

Why is he absent in earlier meeting when Plutorch tries to convince Katniss to be the Mockingjay in the presence of President Coin? And again when she makes her demands for being Mockingjay?

Unlike Effe, Haymitch is pretty much an integral part of the plan to evacuate Katniss from the arena & make her Mockingjay, the face of the evolution. So why is he absent from convincing Katniss & only appears after she agrees?