Java do while Loop not continuing

My do while loop repeats if it receives an invalid input. But then it won't accept a valid input. Where am I going wrong?

So I'm reading the first character in a line from a file and then matching that with user input. If user input matches, this works. If user input doesn't match, it gets stuck in the loop asking for the input again. Which it should do, but also should accept once valid input entered and then end.

public class test {

public static void selection() throws FileNotFoundException {
    boolean f = false;
    Scanner keyboard = new Scanner(System.in);

    System.out.println("Make booking:");

    Scanner file = new Scanner(new File("list.csv"));
    do {
        System.out.print("        Select the car number from the car list: ");
        char input = keyboard.next().charAt(0);
        String storeInput = "";

        while (file.hasNextLine()) {
            storeInput = file.nextLine();
            String finalInput = storeInput;
            if (storeInput.charAt(0) == input) {
                finalInput = finalInput + (" is the booking ");
                System.out.println(finalInput);
                f = true;
            }
        }
        if (!f) {
            System.out.println("Invalid car selection");
        }
    } while (!f);

}

public static void main(String[] args) throws FileNotFoundException {
    selection();
}

}