"Dear David, The congress is finished, and I am sure you are already involved in future events, as we are. I wish to give you our sincere thanks for your cooperation that started in 2018. The congress has had a very good outcome, and the efficiency and beauty of the congress center has been greatly appreciated. Thank you for your willingness and professionality and kindly forward our congratulations to Lucie and to all the staff who have worked in the congress days. I wish we might have another possibility to work together."