Here's a few ideas for Lando TooCoolToHandle:
His line at 0:12 could be used when Han arrives to Cloud City.
http://www.youtube.com/watch?v=0pK5HmuCMBM
Perhaps this could be Lando's theme music?
http://www.youtube.com/watch?v=63gIJiIhiAw
And, after Lando invites Leia for refreshments, when she says yes, Lando could say the final line in this video: