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: What time do you want to make the reservation?

SOLUTION: Yes

PROBLEM: No. The restaurant is Villa D'este. I want it in San Francisco.

SOLUTION: No

PROBLEM: Can I do anything else for you?

SOLUTION:
Yes