"On behalf of the Steering Committee and on my own name, I have the pleasure to invite you to attempt the CBC08. I only ask you to please confirm your participation, filling the registration form online at ... (dead line: May 23). I hope to see you there."
Please, dear illustrious Portuguese scientists, let me read through the stuff first before you publish it. I can't write better, but I can help improve your writing. In exchange I suggest a generous donation to my account at: XZY... please, contact me. ;)