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.

Input: Consider Input: I think not. Thanks for your diligence.

Output: No


Input: Consider Input: I'm taking a client out to dinner and I want to make a dinner reservation.

Output: No


Input: Consider Input: What kind of food would you like? Which city should I search in?
Output: Yes