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.

Example Input: Cetrella restaurant in Half Moon Bay. Book it for 1 o"clock in the afternoon.
Example Output: No

Example Input: Why not? Sure. I can help you on that. At what time you wish to reserve the table?
Example Output: Yes

Example Input: Thanks! That is all I need for now.
Example Output:
No