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: Please give confirmation details: Booking a table at Bombay to Goa at 5:30 pm in the city of San Francisco on next Thursday for 2 people
Example Output: No

Example Input: Yes that works great
Example Output:
No