You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I have 23 places. What area would you prefer to be in? Sentence2: There is Cafe Jello Gallery in the west, Cambridge Artworks in the east and Broughton House Gallery in the centre. Does any of those sound appealing? Sentence3: Just the price range and postal code please. Sentence4: Cafe jello gallery postcode is cb30af and the entrance is free, is there anything else I can do for you? Sentence5: Here is the address 529 Newmarket Road Fen Ditton. Sentence6: Do you have an attraction type preference? Sentence7: You're welcome! Enjoy your visit! Sentence8: that is it. thank you for helping me Sentence9: Yes, I would like to see a museum. Can you tell me the postcode and entrance fee for it? Sentence10: I have no particular area preference. Can you list a few for me to select from? Sentence11: Yes could I have their postcode and entrance fee? Sentence12: Can you give me more information about Yu Garden. Sentence13: Of course! It is a chinese cuisine restaurant located in the east. Anything else you would like to know? Sentence14: I am traveling to Cambridge and excited about seeing local tourist attractions, can you help? Sentence15: I am also looking for the restaurant Yu Garden. Sentence16: Their price range is expensive and the postcode is cb58pa. Are you sure that is all you needed? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: There are lots of local attractions, are you interested in architecture? Sentence2: No thank you. That will be everything I need today. You have a nice day. Sentence3: You're welcome! Have a nice day. Goodbye. Sentence4: I have confirmed a taxi picking you up at backstreet bistro at 24:45. The contact number is 07972785913. A blue volkswagen will pick you up. Can I help with anything else? Sentence5: Yes sure as long as the attraction is in the city center. Could you also provide me with the phone number and postcode of the attraction? Sentence6: Sure. I also need somewhere to eat. I'm thinking something on the expensive side and close to the college. Sentence7: Backstreet bistro is located in town centre. The address is 2 Sturton Street City Centre, phone 01223306306. Do you need any further assistance? Sentence8: Can I get one in the centre of town and looking for gastropub food. Sentence9: Of course. How about Saint Catharine's College, in postcode cb21rl? Phone is 01223338300. Sentence10: Backstreet Bistro is an expensive restaurant in the centre of town that serves gastropub food. Would you like more information or to make a reservation? Sentence11: Alright, there are 33 different restaurants around the college that are expensive. Is there a type of food you are looking for? Sentence12: Hi, I'm planning a trip to Cambridge and would like a few ideas on places to go for fun. Sentence13: Information, please! I'm not looking to make a booking at the moment. Sentence14: Yes, can you book a taxi between the two? I would like to leave the restaurant by 24:45. Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System

Sentence1: Thank you so very much. I am done. Sentence2: You're welcome. Have a good time! Sentence3: You are booked for a blue bmw with the contact number 07889414601. Sentence4: I need to book a taxi to take me to Williams Art and Antiques. I need to leave after 24:30. Sentence5: I'll be leaving from vue cinema. Sentence6: No problem - where should I have them pick you up? Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User