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]: What else can I do?
[EX A]: Yes

[EX Q]: Great, the reservation is done.
[EX A]: No

[EX Q]: Thanks very much. That's all I needed!
[EX A]:
No