Not enough information to be able to answer your question. But hiring the best lawyer is always going to result in a better outcome. Wishing and hoping . . . not so much.
Kelly W. Case
The answer to your question of whether a DWI CAN be reduced/amended to a lesser charge is yes. As to whether or not it is likely in the situation you presented, no one here can tell you that with the information you have provided.
A thorough review of the police report, any statements made by the driver, sobriety test results, etc. is necessary before anyone can advise you as to what the possible realistic outcomes of your specific case are.
Even if the state has a weak case, you still need an attorney to handle this charge. Don't think you'll be able to go into court and talk the prosecutor into amending this one. Hiring an experienced DWI attorney in your area is a must here.