instruction:
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.
question:
Yes. What's their phone number?
answer:
Yes


question:
I want to watch Viva Las Vegas, but make sure it has subtitles.
answer:
No


question:
I'm sorry, I couldn't make the reservation. They don't serve alcohol and they have a brunch menu. Would you like me to try to make a reservation tomorrow for 3 people at 1 PM at West Park Bistro?
answer:

No