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: Do they serve liquor? What is the address of the restaurant.
Example Output: Yes

Example Input: I want a reservation for Hisui in Vacaville at, say, quarter to 8 in the evening.
Example Output: No

Example Input: Yes, I would like to book a table for 2 people.
Example Output:
No