I generally hand in a note to the greeting attendant (is that the right word) as I board. It states my interest in aviation and my current position as far as my training is concerened and list my seat number. I make sure that the letter says that I would appreciate it should they be able.
Once the note has been handed to the attendant I make my way to my seat and sit as normal. I then tend to get an answer as soon as all the passengers are boarded and seated. It is always followed by an explanation if there is a rejection or an request to follow the attendant up to the cockpit.
If it is a rejection I thank the attendant and ask her to thank the captain and it its an acceptance I thank the attendant on the way up the aisle and take my log book with me.
I would like to thank all the pilots who have given me jump seats for take offs, landings and whole flights it really is an honour to join you and thanks to the attendants for helping me get up there in the first place.
I realy do hope events like the recent inccident dont result in a ban on flight deck visits