TASK DEFINITION: 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.
PROBLEM: No. I need to observe it with subtitles. I need to observe The Aftermath.

SOLUTION: No

PROBLEM: are you sure. do you want booking a table at village california bistro and wine bar in san jose on today at 11:30 am for 2 people

SOLUTION: No

PROBLEM: Can you help me make a reservation at 1:15 pm in Concord?

SOLUTION:
No