Hi there,
trying to remove a natural recorded reverb is going to be trciky. If you have access to a recording and editing sofware progaramme such as pro toolsor logic you could try adding a different type of reverb to it, and adjusting the the decay and early reflections. you could also try gating the audio. this would involve setting up the gate so that it would remove any decay from the reverb, you would most likely still have reverb on your initial early sounds.
just some ideas to play around with,hope it helps