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: Do they have alcohol?

SOLUTION: Yes

PROBLEM: Sure, that's perfect. May I also have the exact address for the venue?

SOLUTION: Yes

PROBLEM: No, that's not correct it's for four people.

SOLUTION:
No