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.

[EX Q]: At what time do you want to go?
[EX A]: Yes

[EX Q]: yes, its called marnee in San Francisco.
[EX A]: No

[EX Q]: I want a reservation at the Santa Rosa restaurant.
[EX A]:
No