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: Which city you want?

SOLUTION: Yes

PROBLEM: I was able to successfully confirm those reservations for you and you should be all set with them.

SOLUTION: No

PROBLEM: Can you give me their phone number?

SOLUTION:
Yes