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

[EX Q]: Sentence1: Your booking was successful! Your reference number is EV4ADBI9 . Sentence2: I need it for Sunday. Sentence3: Yes. Let's book it. Sentence4: I would like it to be in the west. It doesn't matter if it has free parking or not. Thank you! Sentence5: There are four three star guest houses. Is there an area of town that interests you the most? Sentence6: Train TR3154 leaves cambridge at 13:06 and will arrive at peterborough at 13:56 on Monday. Would you like me to book a ticket? Sentence7: I am looking to stay at a guesthouse that has a 3 star rating. Sentence8: ok for how long and how many people please Sentence9: I want a train that goes to peterborough and leaves after 13:00 Sentence10: Does it leave on Monday? Sentence11: There is the hobsons house. Would you like me to book it? Sentence12: For 3 days and 2 people,I need a confirmation number too Sentence13: and what day do you need the reservation for? Sentence14: The next train is the TR0545 leaving cambridge at 13:06. Would you like me to book it or more information? Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Is there anything else I can help you with Sentence2: Okay! What is your departure site? Sentence3: Okay, I've got you a black bmw with the contact number 07083984796. Sentence4: Thank you so much! Sentence5: I need to book a taxi to come pick me up by 10:30 to take me to Midsummer House Restaurant. Sentence6: I'm coming from city stop restaurant. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Thanks again and please enjoy your visit! Sentence2: Is it possible for you to make a reservation for me? It would be for Monday. Sentence3: May I recommend Mumford theatre located at anglia ruskin enterprise, east road. Do you need any more information? Sentence4: Can I have the phone number? Sentence5: Thanks, I appreciate it. Goodbye. Sentence6: Book for 4 people on Monday at 18:15. Sentence7: That's all I need. Thank you for your help! Sentence8: Thanks! I am also looking for information on a restaurant named the Ian hong house. Sentence9: You are very welcome happy to help. Sentence10: For how many people please Sentence11: Absolutely! The phone number is 08451962320. Sentence12: your all set! reservation # is XJ3DII6Y . Anything else for you today? Sentence13: that is a chinese restaurant in the center. Sentence14: Can you help me find a theatre in the centre please? Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]:
Answer: (B) System