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: What kind of restaurant would you like to eat at?
Example Output: Yes

Example Input: Sorry but there is no availability for 4:30 pm at Mazzat in San Francisco today. Is there anything else I could assist you with?
Example Output: No

Example Input: Is it expensive, and do they serve alcohol?
Example Output:
Yes