Not an instant answer for you, I'm afraid, but dialogues are a little ephemeral for preservation, and I for one wasn't around in the '30s! The conversation would certainly be different from today, as CRM wasn't even a twinkle in its inventor's eye.
However, Ernest K Gann's book "Fate is the Hunter" was written about that kind of flying, at that period and contains some dialogue during critical emergencies. Amazon might help.
You'd better decide the nationality of your pilots, too, as that will greatly affect the way they behave. (Cf: Gann (US), Beatty(Brit), St-Exupery (Fr), etc).