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: 6:15 in the evening at Bistro liaison.
Example Output: No

Example Input: At what time do you want to eat?
Example Output: Yes

Example Input: Thanks for all your help. That will be all for now.
Example Output:
No