on write_to_file(this_data, target_file, append_data) -- (string, file path as string, boolean)
    try
        set the target_file to the target_file as text
        set the open_target_file to ¬
            open for access file target_file with write permission
        if append_data is false then ¬
            set eof of the open_target_file to 0
        write this_data to the open_target_file starting at eof
        close access the open_target_file
        return true
    on error
        try
            close access file target_file
        end try
        return false
    end try
end write_to_file

using terms from application "Messages"
    on message received theMessage from theBuddy for theChat
        write_to_file(theMessage, "message.txt", False)
        write_to_file(theBuddy, "person.txt", False)
        return
    end message received
end using terms from application "Messages"

when i attempt run this code, it says

Expected “given”, “into”, “with”, “without” or other parameter name but found identifier.

idk what to do,please help.