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: Yes perfect. Do they serve liquor or have live music?
Example Output: Yes

Example Input: Great, thank you! That's all I needed.
Example Output: No

Example Input: The reservation has been confirmed. The price range is inexpensive and they do not have live music.
Example Output:
No