Possible Clues:

• Good-bye (Sp.)
• Pablo's parting word
• "---, amigos!"
• Bolivian ''bye-bye''
• Alternative to 'Hasta la vista'
• Chico's 'ciao'
• "Later, Luis!"
• ''Vaya con Dios''
• Communication equipment initially not right for so long
• ''Goodbye, amigo!''