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: No, that doesn't work for me

SOLUTION: No

PROBLEM: Do you want American, Indian or what type of food?

SOLUTION: Yes

PROBLEM: Hi, I'd like to go out and eat with some friends. Can you book a restaurant reservation for 6:30 pm?

SOLUTION:
No