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

Sentence1: Sure. Please book for 4 nights starting on the same day. Sentence2: Perfect, thank you! I'm also looking for a guesthouse in the area, preferably in the North. Do you have an option that has free parking? Sentence3: I will go ahead and book that for you. Sentence4: Yes, please. I need 2 tickets. Sentence5: I was able to get 2 tickets. Your total is 28.64 GBP and will be payable at the station. Your reference number is 8UDKCNBU . Sentence6: You're welcome, it was a pleasure serving you! Sentence7: I am leaving from Broxbourne. Sentence8: There are 19 trains running from Broxbourne to Cambridge on Sunday. Is there a particular time when you need to travel? Sentence9: Booking was successful. Your reference number is : I78WB6O9 . Can I help you with anything else today? Sentence10: I'm sorry, how many people would you like to book the room for? Sentence11: I have just the train for you! TR9331 will arrive in Cambridge at 17:32, which is within your desired timeframe. Would you like me to book that for you? Sentence12: We have many in that area with free parking. Might I suggest the acorn guest house? Sentence13: From where are you departing? Sentence14: Can you get me one that'll arrive by 18:30? Sentence15: 2 people, 4 nights, for sunday. Sentence16: I'd like to get to Cambridge by train, but I'm afraid I need to travel on Sunday. Will that be possible? Sentence17: Thank you so much. Can I get the reference number also, please? Sentence18: No. Thanks a bunch! Goodbye Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System

Sentence1: No, that's all the information I need. Thanks! Sentence2: You can reach them by phone at 01223312598. Anything else I can help with? Sentence3: Booking was successful. Reference number is : T212RFL5 . Sentence4: Yes, Gourmet Burger Kitchen has North American cuisine and is expensive. It is located in the City Centre. Sentence5: That sound perfect. Could I make a booking for 6 people? Sentence6: I need help finding a guesthouse to stay at. Sentence7: I'd like the east part of town please. Sentence8: Ok great, have a wonderful day! Sentence9: Do you know of a restaurant by the name of gourmet burger kitchen? Sentence10: Of course! What day and how many nights? Sentence11: can you tell me the phone number please Sentence12: Warkworth House is a great place. They are rated 4 stars, moderately priced and offer free parking and internet. Sentence13: How many days will you be staying? Sentence14: I have a number of different guesthouses available. Do you want to stay in a particular part of town? Sentence15: I'll be starting my stay on this coming Sunday. Sentence16: 5 nights please. Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User

Sentence1: What time would you like to depart from Stansted airport? Sentence2: I'm glad I could be of help, enjoy your stay! Sentence3: Your train reference number is 4FQ0OYNJ . As for lodging, what type of establishment, price range, or area can I look for? Sentence4: I will be departing from stansted airport on wednesday. Sentence5: The departing time is flexible, I just need to get to cambridge by 20:45 please and may I have the price as well? Sentence6: Yes. I am also looking for a place to stay. Sentence7: I would like a three star hotel that is expensive. Sentence8: Oh! Great. Thank you, that's all I need today. Sentence9: There are 2 hotels matching that criteria: Gonville Hotel and The Lensfield Hotel. Sentence10: I need a train arriving in Cambridge by 20:45. Sentence11: The Gonville Hotel is available, and your reference number is 7JS42213 . Sentence12: There are many trains arriving at Cambridge by 20:45. Where would you be departing from, and on which day? Sentence13: I have a train arriving in in Cambridge at 5:52pm on that day. The price is 10.10 pounds. Will this work for you? Sentence14: OK, I need rooms for 7 people for 4 nights, starting on Wednesday. Can you tell me which of the two hotels are available then? Question: Who has spoken the sentence 11? (A) User (B) System

Answer: (B) System