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: Sure. What kind of food do you want? You can ask for Mexican, American, Sushi, or anything else. And also, what city should I search in?

SOLUTION: Yes

PROBLEM: Please confirm the following information: The city is San Francisco. The reservation is at Khamsa restaurant at 6 PM today. The number of people in your party is 2.

SOLUTION: No

PROBLEM: Ok, which city will you be dining in?

SOLUTION:
Yes