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: Okay, what time would you like to go out to eat?
Example Output: Yes

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

Example Input: So, it's next Friday for 2 people?
Example Output:
No