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

[EX Q]: Sentence1: Nothing in particular. Any recommendations? Sentence2: Yes, please coming in on monday for 5 nights for 3 people. Sentence3: We have amazing various of attractions in the centre area! What type of attraction are you looking for? Sentence4: I booked it for you. Your reference number is as follows: 5MM5C3UC . Is there anything else I can assist you with today? Sentence5: Any area is fine are there any with a 3 star rating? I don't need free parking or internet. Sentence6: Let me suggest the Museum of Archaeology and Anthropology. Their admission is free and the phone number is 01223333516. Sentence7: Would you like me to book it for you? Sentence8: Happy to help! Have a good trip! Sentence9: I have many moderate priced hotels available. What part of town would you prefer? Sentence10: alpha-milton guest house is in the north. Would you like me to book you a room? Sentence11: Can you book it for me and get a reference number ? Sentence12: i need a good place to go in the centre Sentence13: That will be all, thanks! Sentence14: I also need a moderate priced place to stay. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes, there are 2 in the north, 1 in the east and 1 in the centre. Which would you be interested in? Sentence2: Train TR8464 leaves at 11:21 and arrives at 12:10. Would you like to book that one? Sentence3: Actually none of the pools in our database have an entrance fee listed. Is there anything else I can help you with? Sentence4: Im leaving from Cambridge and going to Stevenage. Sentence5: I'm looking for a train to stevenage, leaving on Sunday. Sentence6: Do you have entrance fees for any of the others? Sentence7: No, I need to leave some time after 14:30, and I'll be traveling to Cambridge. Sentence8: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence9: No thank you that is all the information I need today. Sentence10: Before we do that are there any attractions that feature a swimming pool in town? Sentence11: There are many trains at that time, where are you leaving from? Sentence12: What is the name, entrance fee, and phone number of the one in the center? Sentence13: the 1st train out of cambridge going to stevenage is at 15:21 arriving at 16:10. shall I get a ticket for you? Sentence14: The name is Parkside Pools. The entrance fee is not listed in our database, but you could probably get it by calling them at 01223446100. Question: Who has spoken the sentence 8? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Yes I need the reference number for the booking please. Sentence2: I can get you a train arriving at Cambridge at 12:07, how many tickets will you be needing? Sentence3: Just one, please. Sentence4: Yes that is MKL2A4KD . Is there anything else I can help you with today? Sentence5: I need a train to Cambridge. Sentence6: I'll be leaving from bishops stortford on saturday, and I need to get to cambridge at or a little before 14:00. Sentence7: No, that's all. Thank you very much for your help. Sentence8: I booked Train ID TR4594. Your price is 8.08 pounds. Is there anything else I can do for you? Sentence9: You are welcome. Have a nice day. Sentence10: Ok, when and where are you leaving from? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]:
Answer: (B) System