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

[Q]: Sentence1: Yes sir! Soul tree nightclub is a good one. they are at 8 market passage, postal is cb23hx and phone number is 01223519224, is there anything else that I can assist with? Sentence2: Pick a good one for me. I need the phone number and postcode for it too. Sentence3: Sala Thong is an expensive Thai place in the west. They're located at 35 Newnham Road, cb39ey. Sentence4: Can't wait to come party at one of your nightclubs in town. Sentence5: There are 5 nightclubs in the centre and one in the south. Would you like more information on one of them? Sentence6: Thanks, that is all for today. Goodbye. Sentence7: You're welcome, have a good day. Sentence8: Can you give me information on a restaurant called Sala Thong? Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: What is the address and postcode? Sentence2: That's all I need. Thanks, good bye. Sentence3: The address is Parkside, Cambridge and the postcode is CB11JG. Sentence4: The telephone number for the Parkside Police is 01223358966. Sentence5: Glad I could be of service. Sentence6: I'm looking for a the Parkside police station. Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: I prefer something in the expensive price range. Sentence2: They are located at 17 Hills Road City Centre, their postcode is cb21nw, and phone number is 01223358899. Sentence3: Could you tell me your destination please? Sentence4: Yes, could you please provide the addresses and entrance fees for the churches in the center? Sentence5: I need to go to the sesame restaurant and bar. Sentence6: There are several beautiful churches in the center; are you willing to pay to enter? Sentence7: I am also looking for Chinese food in the city center. Can you help me find some restaurant options? Sentence8: I just need the address, postcode and telephone number for the restaurant at this time. Sentence9: You're welcome! Have a nice day. Goodbye. Sentence10: That will be everything I needed today. Thanks for your help! Sentence11: Would you happen to know of any attractions involving architecture in Cambridge? Sentence12: Okay, I've booked a car for you. It's a white Tesla. The contact number is 07746645374. What else can I do for you? Sentence13: Sure, All Saints Church on Jesus Lane and Holy Trinity Church on Market Street are free to enter. Great Saint Mary's church on Market Square is 2 pounds to enter. Sentence14: The Sesame Restaurant and Bar sounds perfect for you. Would you like me to reserve it? Sentence15: We have 10 Chinese restaurants in the centre area. What price range are you looking for? Sentence16: Can you help me look for a taxi that will leave All Saints Church by 17:45? Question: Who has spoken the sentence 15? (A) User (B) System
[A]:
Answer: (B) System