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: Please confirm the following: Reserving a table for 2 at Angel Fish in Alameda for today at 12 pm.
Example Output: No

Example Input: At what time do you want to go?
Example Output: Yes

Example Input: Yes I confirm and do they serve liquor?
Example Output:
Yes