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: To confirm, the reservation would be for a party of 2 at Bj's Restaurant & Brewhouse in San Jose. It would be at 4:30 pm today. Is this correct?
Example Output: No

Example Input: Is there a preferred restaurant you are looking to make reservations at and what city will this be in?
Example Output: Yes

Example Input: Yes, that is excellent.
Example Output:
No