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

[Q]: Sentence1: If you can go ahead and recommend one and provide me with the phone number and address please. Thanks so much. Sentence2: I would like to book a train to Leicester that leaves on Saturday. Sentence3: That's all for today. Thank you for your help! Sentence4: Would you like to book a seat on TR1832? It will leave at 15:21 and arrive at 17:06, 105 minutes later. It will cost 30.24 pounds. Sentence5: sure, there are several in that area. including art galleries and history museums. Sentence6: Yes, do you have a certain time you'd like to leave or arrive by? Sentence7: broughton house gallery is located at 98 King Street and their phone number is 01223314960. Do you need anything else? Sentence8: Thank you for calling today. Sentence9: I'd like to leave after 15:15 please. Sentence10: In the centre, please Sentence11: Booking was successful, the total fee is 30.24 GBP payable at the station. Your reference number is VHWYUF80 Sentence12: What area are you interested in? Sentence13: i also want to check out some museums while i'm in town. Sentence14: Yes, can you please book that for me and send me a reference number. Thank you Question: Who has spoken the sentence 12? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: You're very welcome! Goodbye. Sentence2: When and where did this accident occur? Sentence3: Absolutely! The police station phone number is 01223358966 and their address is Parkside, Cambridge. What else can I do to help? Sentence4: I just need an address and phone number for the police please Sentence5: I was in a car accident dispute and I am looking for help Sentence6: I think that is it, thank you. Question: Who has spoken the sentence 1? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: i need to get to kings lynn. i want to leave after 20:45 Sentence2: Thanks for the information. I believe I have everything I need. Sentence3: That sounds good. What is the arrival time and train ID? I'll also need the price of the ticket. Sentence4: thank you for helping Sentence5: Okay, your booking was successful. The reference number is : BBO5NVNF . Is there anything else I can help you with? Sentence6: There is a train that leaves at 21:00. Sentence7: Okay glad I could help. Sentence8: Yes, I need a train on Tuesday from Cambridge. Sentence9: Either would work for me. Just a decent room is all I really need. I'm going to be at a business conference in the north so maybe in that area. Sentence10: You are so welcome. Is there anything else I may assist you with today? Sentence11: Did you want a guesthouse or a hotel. Maybe you need a certain area of town? Sentence12: I'm looking for a place to stay that is moderately priced and includes free wifi. Sentence13: Yes please. I'll need a room for 7 people and 3 nights starting on Monday. Sentence14: I think the ashley Hotel best suites your needs, would you like me to book a room? Sentence15: TR8387 Will arrive at 21:58. 9.80 pounds. Sentence16: Is there a specific time and destination you are traveling to? Question: Who has spoken the sentence 7? (A) User (B) System
[A]:
Answer: (B) System