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: Please help me make a restaurant reservation for later today.

SOLUTION: No

PROBLEM: It has to be in San Fran.

SOLUTION: No

PROBLEM: Which city are you located in, and what kind of food would you like to eat?

SOLUTION:
Yes