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

[Q]: Sentence1: Thank you. I am also looking for a particular restaurant, it is called Charlie Chan. Can you provide me its address? Sentence2: I want able to book your room at the Gonville Hotel for you for the two nights. Your reference number for this is KYXT8TUS . Sentence3: I would like to book for four people for three nights beginning on Tuesday. Sentence4: No, thank you. That's all I needed today. Sentence5: Does the Gonville Hotel have guesthouse accommodations? Sentence6: Yes please book it for four people in 3 nights starting on Tuesday Sentence7: Before I book this hotel I just want to inform you that I have confirmed that it is not a guesthouse but a hotel. Would you still like me to book? Sentence8: No how about two nights? Sentence9: I believe so, yes. Sentence10: Unfortunately it can not be booked for 3 days. Did you want to get information about a different hotel instead? Sentence11: I am looking for a 3 star hotel with free parking in Cambridge. Sentence12: Absolutely. On what day, for how many people and how long is your stay? Sentence13: Certainly! The address for the Charlie Chan is Regent Street City Centre. Would you like me to book a reservation? Sentence14: Thanks for contacting Cambridge TownInfo centre. Let us know if you need anything else and have a great day! Sentence15: I found a handful of locations that might suit your interests. Would you care to check out the Gonville Hotel? It has everything you are looking for in accommodations. Sentence16: Can you book this hotel? Question: Who has spoken the sentence 5? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: I have two restaurants that meet your needs, Graffiti and Travellers Rest. Would you like to make a reservation at one of those? Sentence2: Yes, I need to book a table for five people at 17:15 for this Thursday. Sentence3: Thank you so much. Have a nice day. Bye. Sentence4: A reservation at 16:15 was successful at Graffiti. Your reference number is VCCP7L4M . Is there anything else I can help you with today? Sentence5: You're welcome, have a good meal. Sentence6: Will you check 16:15? Sentence7: Are there any expensive British restaurants in town? Sentence8: There are 57 restaurants that match your specifications. Do you want anything more specific? Sentence9: Yes, I'd like to find one in the west side of town. Sentence10: I am unable to book a restaurant at that time on Thursday. Is there another day or time slot I can check for you? Question: Who has spoken the sentence 5? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: Hi, I I'm looking for a hotel to stay at that is moderately priced and includes free wifi. Sentence2: Yes. I do need the booking number and would also like to check into a train. Sentence3: Where would you like to depart from? Sentence4: There will be 4 people for 2 nights starting Monday. Sentence5: Is there another hotel that has a room available for 4 people for 2 nights starting on Monday? Sentence6: Your booking request was successful!, Would you like the reference number? Or is there anything else I can help with? Sentence7: If you have no other preferences to help narrow it down, may I suggest the Acorn guest house? It's very nice, with free wifi and free parking as well. Sentence8: I'm sorry, but the hotel isn't available for your stated days. Would you like to try another day or a shorter stay? Sentence9: There are no rooms available for 2 nights starting on Monday. How about a different day or a shorter period? Sentence10: That is perfect. Please book 3 days starting on Sunday. Sentence11: What is the travel time for the train? Sentence12: You said Sunday at first and they you just said Monday. Do you want it for Sunday or Monday? Sentence13: Okay, how about for 1 night? Sentence14: I only need one ticket. Thank you. Sentence15: You're welcome! Have a great day! Sentence16: We have 11 such entries. Does free parking matter to you? Sentence17: Absolutely. How many tickets would you like to get? Sentence18: I am not sure but I do want it to have a 4 star rating. Sentence19: I'd like to go from Broxbourne to Cambridge on Monday. Sentence20: Hi, we have several trains leaving on monday. Is there a particular time of day, you'd like to leave? Sentence21: I have 17 different options. In order to narrow down an option for you, can you tell me what area you would prefer? Sentence22: The train leaves at 13:32 and arrives 14:32 for a travel time of 60 minutes. Is there anything else you need? Sentence23: That's all. Thanks! Goodbye! Sentence24: I would like to leave after 12:30 Sentence25: Yes, please, and can I have a confirmation number as well? Sentence26: Okay and how many guests will be included in the reservation? Sentence27: I have several trains running that day, the earliest I can offer that leaves after 12:30 is TR3108 which leaves at 13:32 and arrives by 14:32, would you like me to book your tickets? Sentence28: Not really, but free parking could be nice. Sentence29: Sorry. Monday is what I want. Sentence30: I have booked your ticket for one, is there anything else you need? Question: Who has spoken the sentence 12? (A) User (B) System
[A]:
Answer: (A) User