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, book me for Sunday departing from london kings cross. Sentence2: Your booking is successful. Train is leaving at 07:17 and it costs 151.04 GBP. Your reference number is 5Y7XKAJY . Anything else I can help with? Sentence3: I need a not later than 9:15 train to Cambridge. Sentence4: 8, please Sentence5: How many tickets will you require? Sentence6: It looks like there's a train for Cambridge with an arrival time of 07:07. Would you like me to book that for you? Sentence7: Okay thank you for calling. Don't hesitate to call us again. Sentence8: No thank you that's I need! Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Frankie and Bennys serves italian food in the expensive price range, and their postcode is cb17dy. Would you like assistance in making a reservation? Sentence2: Departure time doesn't matter, I just need to arrive at the stansted airport by 21:30 on Thursday, and I need to depart from Cambridge. Sentence3: When are you leaving? Sentence4: I don't need tickets at the moment, but I do need the price and train ID for that 19:40 departure, please. Sentence5: I need a train that leaves Cambridge on Thursday. Sentence6: There are 202 trains leaving Cambridge on Thursday. Would you like to narrow your search by destination and time? Sentence7: Can you tell me the postcode, food type, and the price range? Sentence8: The train id for that is TR9030 and the price is 10.10 pounds. Is there anything else you'd like help with today? Sentence9: I am going to the stansted airport and I need to arrive by 21:30. Sentence10: Yes, the 19:40 train will arrive at 20:08. How many tickets would you like? Sentence11: I'm also looking for a particular restaurant, it's called Frankie and Benny's. Sentence12: Thank you for contacting the Cambridge TownInfo centre. We're here any time you need to get around Cambridge! Sentence13: No, that's all I needed. Thank you. Sentence14: Can I please have one at 19:40. I will get there by 21:30 correct? Sentence15: I was able to find it, what information would you like on it? Sentence16: I have 16 train departures fitting your preferences. They leave every :40 of the hour starting at 5:40 to 20:40, would you like me to book one of these? Question: Who has spoken the sentence 10? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: That same day that the train is. Sentence2: Thank you. I am also looking for a 4 star hotel located on the west side of town. Sentence3: The TR1499 leaves at 17:11. Sentence4: I am looking for information in Cambridge Sentence5: Huntingdon marriott hotel would be great for you. Would you like reservations? Sentence6: There are three 4 star choices in the west part of town. Two cheap and one expensive choice. Do you have a preference? Sentence7: can you book it for 3 and give me the reference number please ? Sentence8: Price doesn't matter but I need it to be a hotel. Sentence9: Booking was successful, the total fee is 23.52 GBP payable at the station. Reference number is : 7FJ6TZUM . Sentence10: Your booking was successful. Your reference number is NK5JAGZB, is there anything else I can help you with today? Sentence11: Actually I need a train to Cambridge from Kings lynn on Saturday after 17:00. Sentence12: That is all I need today. Thank you for all your help! Sentence13: What day would you like your reservations to begin? Sentence14: Great. You are welcome to use this service again should you need it. Sentence15: Yes, please. I will also need the reference number. Sentence16: It will be 3 people and 3 nights Sentence17: I'd love to help. In the future, these hits require more effort. Want something in the north? Sentence18: I'd be happy to help you book that, I will need the day you're arriving, how many people and how many nights? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]:
Answer: (B) System