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: No, that will be all. Thank you very much.
Example Output: No

Example Input: Can you tell me if the prices are inexpensive?
Example Output: Yes

Example Input: Do you prefer any special kind of food like Indian, Chinese or any other food?
Example Output:
Yes