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: Yeah that's perfect. Where is the restaurant? What type of food do they serve?

SOLUTION: Yes

PROBLEM: Do they serve alcohol? What's the address?

SOLUTION:
Yes