Help me

Dear Guru,
please help me,,,,

i have listbox1 with data from notepad like this,

morning;good morning %hi
evening;good evening %hi
afternoon;good afternoon %hi
hello;hello %hi

i have,

text1.text ="Freddy"
text2.text ="morning"


i want replace %hi with data from text1.text

i want replace text2.text data morning,night or "hello" with data from listbox1

so the result is like this

text3.text = "good morning Freddy"
text3.text = "hello Freddy"

please any help thanks,,,