I have this program that will convert .txt or any word extention document file into what ever a user wants (no matter how outrageous they want to change it to). The problem is that my programing limmit has been reched and I need help in a module or if anyone knows an actual raw code that will make this work

....and if it can be defined in the code by the def command thats cool to

....this is bugging the hell outa me 0_o
I just know it has to be something simple, but I just can't see the code in this prog I'm making.Anywho in the end its has to look sorta like this :
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Data Format Converter
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Enter the name of the data file to convert:
file.dat
Enter a file name for the converted data:
weather.new
Processing file ... done.
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Well the ya go nothing hard in output but the processing is hell I just can't wrap my mind around it.