Good Bye!
 
 

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Good bye!
  I must be going. Mne nAdo idti
  Good-bye. Do svidAniya
  Bye for now. PokA
  See you soon. Do vstrEchi
  See you again. Do skOrova svidAniya
  See you later. UvIdimsya pozdnEe.
  Cheerio! PokA!
  All the best. VsegO nailUchshego.
  Good luck! UdAchi!
  Give my regards to.. PeredavAy privEt.....
  My love to.... PeredavAy privEt (less official way)
  I hope to see you soon. NadEyus' vskOre vstrEtit'sya s tobOy
  I'll call you later. Ya pozvonyU tebE pozdnEe
  Have a comfortable journey! SchastlIvogo putI
  (In Response) Schastliva ostavAt'sya!
  Keep well! Ne bolEy. Bud' zdorOva.
  Take care! BeregI zdorOvie!
  Till we meet again. Do nOvyh vstrEch!
  Write me. Pishi
  Here's my address. Vot moy Adres
  It's for à keepsake. Eto na pAmyat'
  Have a success! UspEhov!
  Sweet dreams! PriyAtnyh snOv!
  Be happy! Schastlivo!
  See you! Uvidimsya!