Here's what others may expect:
"We are always pleased to see new ideas, and we have now completed our review of this material. I discussed your manuscript with several people within the publishing department, including our Product Manager over the Proper Romance genre. It is obvious that you have invested a considerable amount of time and energy into this project. Our publishing schedule is quite competitive, however, and as we look carefully at all the issues involved in publication, we are forced to be extremely selective in our publishing decisions. I am sorry to inform you that we are not in a position to pursue this project with you. While we enjoyed the concept of your story, we didn’t feel it was the best fit for us. Unfortunately, the demands of our editorial workload prevent us from sending detailed comments about your work."
Hope this helps!