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]: Any preferred restaurant?
[EX A]: Yes

[EX Q]: I'd like to make a reservation for 2 at Milpitas.
[EX A]: No

[EX Q]: sorry I could not make a reservation at that time. They are a French Restuarant. Shall I try to book a reservation for 2 today at 6 pm at Bistro Liaison?
[EX A]:
No