You are given a sentence from a conversation between a human and a virtual assistant. Your task is to identify whether the sentence is a question or not. Answer with Yes or No.
--------
Question: Why not? Sure. I can help you on that. At what time you wish to reserve the table?

Answer: Yes


Question: To confirm, you want a reservation for Celia's By The Beach in San Francisco.

Answer: No


Question: Do you need any further assistance from me?

Answer:
Yes