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.
--------
Question: Yes, that sounds right. What's their number, and do they serve alcohol?

Answer: Yes


Question: Sorry, the reservation was unsuccessful. What else may I do for you?

Answer: No


Question: Do you have a restaurant in mind? Which city and at what time?

Answer:
Yes