Yes, you can make a reservation without real booking! I just did it when I applied for the schengen visa.
Go to any travel agent and ask them for "print eticket" that just without paid reservation.... they will tell you that the reservation will be canceled automatically after 3 days, but tell them that you know that.
You can try with Airfrance, lufthanza, iberia, or whatever the airline you want.
I hope the answer is helpful!