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

[EX Q]: Sentence1: Yes, where would you like to go to? Sentence2: Is there an area you'd prefer to stay in? Sentence3: Yes, book that one please. Sentence4: No free parking is not necessary. Sentence5: I prefer a moderate price one. Sentence6: Your room is reserved, ref# UCVH6QPU . Is there anything else I can help you with today? Sentence7: Would you help me book a train for Thursday, please? Sentence8: Can I get the reference number for that booking? Sentence9: There are over 200 trains going to Cambridge on Thursday. Where will you be departing from? Sentence10: Your booking was successful. Your reference number is Z3NAOPSY . Sentence11: Is that for 2 people? And I need it for 5 nights starting thursday. Sentence12: I would like a cheaper hotel. Sentence13: I would like to go to Cambridge Sentence14: That narrows us down to about 19 trains. Do you have a time you would like to leave after or arrive by? Sentence15: Ok I Am going to book a cheaper hotel for you ,have a good day,thank you. Sentence16: There is nothing in the price range you mentioned. Would you be willing to stay at a cheap hotel or an expensive hotel? Sentence17: Not that's it. Thank you so much! Sentence18: In the east. With free wifi, please. Sentence19: Do you need free parking? Sentence20: I would like to leave after 15:45. Sentence21: Yes, please. I am also looking for a place to stay, ideally a hotel with a 4 star rating in the moderate price range. Sentence22: Then in that case, I recommend the TR0209 which departs from Kings Lynn at 16:11 and gets into Cambridge at 16:58. Would you like me to book it for you? Sentence23: I'm sorry, let's get your hotel choice fixed first. There is one cheap hotel - The Cambridge Belfry. It has free internet and parking. Can I book this one for you? Sentence24: I found 3 guesthouses matching that criteria, I would recommend the Carolina Bed and Breakfast. Located in the east, 4 stars, and has free wifi. Will this one work? Sentence25: I will be leaving from Kings Lynn. Sentence26: Ok. Thank you for choosing Cambridge Towninfo Centre. We hope you enjoy your stay. Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: There are 5 expensive Indian restaurants available in the west. Would you like me to book one of those for you? Sentence2: Can you help me find and expensive restaurant in the west? Sentence3: I would like to eat at an indian restaurant please. Sentence4: You are welcome. Thank you for calling Cambridge TownInfo Centre. Good bye. Sentence5: Yes, please choose one and book it for 6 people at 13:30 on Thursday. Sentence6: We have nine. What sort of cuisine would you like? Sentence7: No, that's it for today. Thank you for all your help. Good bye. Sentence8: Ok. I was able to book cocum on thursday at 13:30 for 6 people. Your reference number is LTZ2TPIA . Can I help you with anything else? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Booking was successful. The table will be reserved for 15 minutes. Reference number is : V6LXVBDJ . Sentence2: I am also looking for a place to stay that has free wifi. Sentence3: Do you want to stay in a particular area of town? Sentence4: rad, thanks for your help. Sentence5: Not at this time thank you. Sentence6: Can I help with anything else today? Sentence7: I will take the University Arms Hotel, please. I would like it booked for 4 nights on Friday. There are 5 people in my group. Sentence8: They do have free internet and parking but the price is in the moderate range. Sentence9: Hi, I'm trying to find a restaurant called sala thong. Sentence10: I definitely want to stay in the expensive range, so how about we change the area to the centre of town. What do you have there with wifi and parking? Sentence11: We have Gonville Hotel with 3 stars and University Arms Hotel with 4 stars. Which would you like more information on? Sentence12: Sure. I need a table for Friday at 14:15 for 5 people. Sentence13: Thank you for calling and have a great day. Goodbye. Sentence14: How about kirkwood house?? Sentence15: Is that in the expensive price range and do they have free internet and parking? Sentence16: You are all set the reference number is CZ52QG8N, anything else today? Sentence17: Yes, I want to stay on the north side of town. Sentence18: Sala Thong is a great Thai restaurant in the West. Would you like me to book a table for you? Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]:
Answer: (B) System