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

[Q]: Sentence1: Hi, I'd like to book a train that leaves after 21:30 on Friday. Sentence2: You're very welcome! Enjoy your trip! Sentence3: There are 4 restaurants that serve gastropub cuisine. Do you have a location and/or price preference? Sentence4: Yes could you provide me with the travel time and arrival time as well please? Sentence5: Moderate price range please. Sentence6: Please, for 7 people at 13:00 on the same day. Sentence7: TR8202 is leaving cambridge at 22:01 would that work for you? Sentence8: I'll be leaving Cambridge and traveling to Birmingham New Street. Sentence9: Yes can we try the south? Sentence10: The travel time for the TR8202 is 163 minutes. The arrival time is 24:44. Is there anything else I can help you with? Sentence11: I'm also looking for a place to dine. The restaurant should serve gastropub food. Sentence12: Perfect, there's a place called The cow pizza kitchen and bar, would you like me to book it? Sentence13: Sure, where are you departing from and going to? Sentence14: How about centre? Sentence15: Booking was successful. The table will be reserved for 15 minutes. Reference number is : BGGCS2UB Sentence16: Thank you so much. That's all I need today. Have a great day! Bye. Sentence17: Yes, there are 3! Price ranges are moderate and expensive. Does one of those suit you? Sentence18: I am sorry there are none in the South. There are 3 in the centre and 1 in the east. Will one of those area work for you? Question: Who has spoken the sentence 8? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Yes I have it for you, its 0123357187 Sentence2: Yes, I will need the reference number please. Sentence3: Will you be needing a reference number? Sentence4: Do you have any cuisine preferences? Sentence5: any of them. book a table for 2 people at 18:45 on wednesday Sentence6: Sure. Would you like to reserve a table at Ugly Duckling, Tang Chinese, HK Fusion, or Sesame Restaurant and Bar? Sentence7: I'm looking for a luxurious dining experience in the centre of Cambridge. Sentence8: I would really like asian oriental food tonight. Question: Who has spoken the sentence 5? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: I have train TR0077 that leaves at 9:01 and arrives at 11:44. Would you like me to book it for you? Sentence2: Thank you. I need to find a train from Cambridge to Birmingham New Street leaving on Tuesday and I need it to arrive by 12:45. Sentence3: I would prefer the centre of town. Sentence4: I have a number of restaurants available. Is there a particular area of the city where you would like to go? Sentence5: You're welcome. Did you need more help? Sentence6: can you book a table for 3 on monday at 18:45 Sentence7: That is everything that I need. Sentence8: You are great thanks ! Sentence9: Glad I could help. Have a great day. Sentence10: I highly recommend Riverside Brasserie. It's located at Doubletree by Hilton Cambridge Granta Place Mill Lane. Is there anything else i can help you with? Sentence11: Yes for sure! That booking was successful and your reference number is L6EX6O5W . Sentence12: That sounds perfect. Could you book it for the same group of people, please? Sentence13: Where can I find a moderately priced restaurant that serves European food? Sentence14: I booked it for you. reference number is J92CR71U . Anything else today? Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User