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: I can help you with that, let's gather some specifics first. Do you have a particular restaurant in mind, if not what area would you like me to look in, and what time do you need the reservation set for?
Example Output: Yes

Example Input: Is this correct? I will be booking a reservation for 2 people at Aquitaine Wine Bar & Bistro for 12 pm today. It is in the city of San Francisco.
Example Output: No

Example Input: What time is it for? Which city should I search in and do you have a preference?
Example Output:
Yes