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]: Who directed the movie?
[EX A]: Yes

[EX Q]: To confirm: I'm booking a reservation for 2 people at Jing-Jing Szechwan & Hunan Gourmet in Palo Alto next Friday at 12:15 pm.
[EX A]: No

[EX Q]: Yes that works for me
[EX A]:
No