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.

Q: Would you prefer Mexican, Chinese, or something else?

A: Yes
****
Q: Yes that's fine

A: No
****
Q: Can you please confirm the books details: A reservations for tomorrow is set for 4 people at 12 pm at the Maruya restaurant in San Francisco.

A:
No
****