Bon voyage, chere soeur.
safe trip mean passe un bon voyage in french
for you, my darling -> pour vous, ma chérie
People sometimes say 'safe journey' or occasionally use the French 'Bon Voyage'.
Bon voyage would be close enough.
Bonjour chérie
Ma cherie.
my trip to france
Tu me manques, cheri.
mon cheri
belle ma chérie
Mais oui, mon ami.