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: Yes perfect. Do they serve liquor or have live music?

SOLUTION: Yes

PROBLEM: Yes, what time should I make it?

SOLUTION: Yes

PROBLEM: Your reservation was booked. Please note they do not serve alcohol.

SOLUTION:
No