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

Sentence1: Enjoy your day. Good bye. Sentence2: The address is colville road, cherry hinton. Sentence3: That is all I need, thank you. Sentence4: Sure, I can get you aboard a 15:21 arriving at 17:06. Would you like me to book a seat aboard TR9839? Sentence5: Sounds good. What is the postcode, please? Sentence6: You're welcome! Have a great day! Sentence7: Of course. The Cherry Hinton Village Centre has multiple sports in the east end of town. Sentence8: There are quite a few running all day to many different stations. Where would you like to go? Sentence9: I need a train leaving cambridge on thursday. Sentence10: I would like to go to Leicester and get there by 18:45 Sentence11: The postcode is cb19ej. Is there anything else I can help you with? Sentence12: Good bye. Sentence13: Thank you for using our service. have a good day! Sentence14: Oh wait! Before you go, can you give me some information on the cherry hinton village centre? Sentence15: Yes, may I have their address, please? Sentence16: Not right now. Thanks for the information though! Have a great day! Goodbye. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: Can I get some information about visiting Great Saint Mary's Church? Sentence2: Thanks. I am also looking for an expensive place to eat in the centre. Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : XWZ8N8GF . Anything else I can do? Sentence4: Sure, there are plenty of places in the area. Did you have a particular type of cuisine in mind? Sentence5: Sure, is there anything specific you'd like to know? Sentence6: What is the entrance fee for that attraction? Sentence7: This is found in the center of town. Their phone number is 01223350914 and their postcode is cb23pq. Sentence8: Admission to Great Saint Mary's Church is 2 pounds. Sentence9: Definitely, Please book me for 7 people at 14:45 on wednesday. I also would like the reference number. Sentence10: No, just expensive in the centre. Recommend one for me. Sentence11: Thanks! That's all I needed. Sentence12: I'd really like to visit Great Saint Mary's Church. Could you give me some information about it? Sentence13: You should try dining at kymmoy, an asian oriental restaurant located at 52 Mill Road City Centre. Would you be interested in booking a table? Sentence14: You're welcome! Have a wonderful day. Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User

Sentence1: Okay, you are very welcome! Goodbye! Sentence2: Yes please for two people at 16:15 on Wednesday please if its not too much trouble. Sentence3: Restaurant Restaurant Two Two is an expensive French restaurant in the north with wonderful food. Would you like to book a table? Sentence4: Yes, could you help me find a nice place to dine in the north. Sentence5: Thats all for today thanks ! Sentence6: Booking was successful. Reference number is : DYAMG2CY . Can I help you with anything else today? Sentence7: The Avalon is a 4 star hotel in north Cambridge that is in the moderate price range. Would you like their phone number? Sentence8: I have made your reservation at restaurant two two. Your reference number is VIVBN8WU . Sentence9: Can you please try French food instead? Sentence10: Do any of these places serve Vietnamese food? Sentence11: Unfortunately, there are no results. Would you like me to search a different area or food type? Sentence12: We have many fine places in the north. I personally recommend the City Stop. Sentence13: Can you tell me about a particular hotel called the avalon? Sentence14: Actually, could you book a room for me? I need it for 2 people, 5 nights. We'll arrive on Wednesday. Question: Who has spoken the sentence 12? (A) User (B) System

Answer: (A) User