instruction:
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:
Thank you, that's perfect. Do they serve liquor?
answer:
Yes


question:
Are you looking for any kind of cuisine? Chinese? Maybe American?
answer:
Yes


question:
I would like to make the reservation for four people. It will be in the morning 11:30. It will be in San Fran.
answer:

No