Couple of years ago, I submitted almost all the proper apps and info the Embassy in D.C. requested; but, forgot to include a copy of travel documents (ticket) for arrival and departure.  Embassy lady called; advised that a copy of itinerary would be sufficient.  I can write itinerary's all day long - no problem.  The Embassy was happy with my 'opinion' of my itinerary.  
Airlines might be a different story.