To ease the process of the registration to an event, we prefill the first row which holds the info of the attendee (name, email, phone), if they are available. In most cases, the attendee: - Take a ticket for himself - Take a ticket for someone he's responsible of - Take a ticket for someone else who doesn't want to be troubled by that (ex: an assistant of a CEO) task-2346145 closes odoo/odoo#58829 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>