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: Sure, which city?

SOLUTION: Yes

PROBLEM: Please suggest other restaurants.

SOLUTION: Yes

PROBLEM: Actually, I need some more time to prepare. I instead want it in SFO on the 14th of this month.

SOLUTION:
No