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: Who directed the movie?

SOLUTION: Yes

PROBLEM: In which city are you looking for the restaurant and do you have any preferred cuisine?

SOLUTION: Yes

PROBLEM: Unfortunately the reservation could not be made. Is there anything else I can do?

SOLUTION:
No