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: Do you prefer any special kind of food like Indian, Chinese or any other food?

SOLUTION: Yes

PROBLEM: Please reserve it for 7 in the evening.

SOLUTION: No

PROBLEM: I would prefer SF.

SOLUTION:
No