Dear Dr. Isham alzobi, We understood your problem and respect itI would like to inform you to we can't wait for till conference because we have book your confirmation slot So, we need confirmation from your side through registration We will sent you an a invoice you can pay through bank kindly let us know according to that we will prepare an INVOICEi hope you are ok with that Waiting for your response RegardsLenora Twain Biofuels 2020