Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: How about an art museum? Sentence2: Yes, i am also looking for museums to visit in the centre of town. Sentence3: cambridge contemporary art has free entrance. Their phone number is 01223324222. Is there anything else I can help you with? Sentence4: I am looking for a place to stay on my upcoming visit. I can't wait to see some of your local tourist attractions. Sentence5: Get me one in the West place Sentence6: The Cambridge Art Museum is very popular and has no entrance fee. Is there anything else I can assist you with? Sentence7: Do you have their phone number and how much is the entrance fee? Sentence8: I am looking for a moderate priced 3 star hotel with free parking and free WiFi. Sentence9: Great, have a terrific stay! Sentence10: There are lots to choose from in the centre. Are you interested in art, archaelogy, antiques or history? Sentence11: Your reservation has been confirmed for 7 people staying 4 nights at the Hobsons House. Your reference number is KPO3GJ93 . Is there anything else I can help you with? Sentence12: I have found one in the south, the north and the west. Do you have a preference? They are all very comparable. Sentence13: Nope, that'll be all for today. Thanks so much for your assistance, you've been very helpful. Sentence14: The Hobsons House meets your criteria. Is there anything else I can do for you? Sentence15: Can you tell what area you will be staying in? Sentence16: Yes, can you reserve a room for me. There are 7 of us and we want to stay for 4 nights arriving on Sunday. Question: Who has spoken the sentence 15? (A) User (B) System
Output:
Answer: (B) System