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.

Let me give you an example: I am feeling hungry so I would like to find a place to eat.
The answer to this example can be: No
Here is why: The user is informing the intent, but not asking any question here

OK. solve this:
At what time reservation to be?
Answer:
Yes