There seems to be nothing wrong with your code. Keep in mind the input field should not provide a drop down menu, it should give suggestions upon typing. Type y in the field and see if it works. If it is not working there might be something wrong with the rest of your code. Please provide the code if this is the case.
Hint for the next time when presenting code on the forum use the “preformatted text” option, paste the code in the text box, select it all and press the </> button. Like so:
<label for="quote">Motivational Quote:</label>
<input id="quote" name="quote" type="text" list="quote-choices" required>
<option value="you win the lottery!"></option>
<option value="your ex comes crawling, begging you to take him back!"></option>
<option value="your parents are actually proud of you for the first time!"></option>
<option value="your student loans are paid off!"></option>