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 time is it for? Do you have a preferred restaurant?
Example Output: Yes

Example Input: I would like a reservation for two people at Shiki at one in the afternoon.
Example Output: No

Example Input: Ok, well try Taste of the Himalayas.
Example Output:
No