I gotta say... that if you can get a busy gate agent who is trying to accomodate all the other passengers with seat assgnments, upgrades, VDB's/IDB's, finalizing departure etc to sit still and actually listen to you say all of this...

quote:
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Hi. I'm Mark Love. I'm traveling with you in Economy today [insert mention of Full Fare if applicable] and I've got a nice aisle seat which I'm very happy with. But if at any time, you should need my seat for any reason, I'd be more than happy if you wanted to move me up. I'll be sitting right over there. I've got an easy name to remember...Love. Thanks!
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then I'd be pretty suprised. I usually have enough trouble askng a smiple question like "do you have any isle seats"

I find that just relaxing, taking a seat, listening to pages and letting them do their job works very well as far as op-ups go

Still... whatever works for you