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 that works for me. Do you know if they serve liquor? Also, can i get the contact number please?

SOLUTION: Yes

PROBLEM: I can help you with that. What kind of food are you interested in?

SOLUTION: Yes

PROBLEM: Can you reserve a table for me?

SOLUTION:
No