A few weeks ago I submitted a two-page abstract to a conference in environmental sciences/ecology/biology. I haven't received the decision yet – poster or presentation. A few days ago I found out there will be a different conference, where my contribution would fit better and the main speakers are directly from my field and I could finally meet them.
Due to funding I probably cannot attend both conferences, so I have to choose. Another approach would be to withdraw my current submission and send a different one to the second conference.
Is it unethical to withdraw my submission and send it to other conference?