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, of course. How many tickets would you like booked? Sentence2: Where are you traveling to and from? Sentence3: I have reserved your table. Your reference number is TRQQXOBM . Sentence4: Thank you. Sentence5: The train departs Cambridge at 13:06. Sentence6: No, I think that's all I need today. Thank you for your help! Sentence7: I am traveling from Cambridge to Peterborough. Sentence8: Thank you for using this system. Sentence9: We have many trains that fit your needs. The latest one you could take would be the TR9792 which would have you arriving at 13:56. Sentence10: I have 2, one in the south and one in the centre of town. Both are cheap and serve portuguese food. Sentence11: Thanks for that, I am also looking for a train that should arrive by 14:15 and should leave on Thursday. Sentence12: Okay great. enjoy your travel and thank you for calling. Sentence13: Could you book a reservation for me? I would like a reservation for 6 people at 14:00 on Wednesday. May I also have the reference number? Sentence14: I'm looking for a cheap restaurant that serves portugese food. Sentence15: Booking was successful for TR9792, the total fee is 99 GBP payable at the station. Your reference number is : BKXNWE2O . Do you need any further assistance? Sentence16: Thank you. Can you please book that train for me? Sentence17: I need 6 tickets. Sentence18: OK, thanks. When does that train depart? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Booking was successful, the total fee is 450.6 GBP payable at the station . Reference number is : G368B2VI . Can I help with anything else today? Sentence2: I would like to stay in the centre of town please. Sentence3: TR0254 Leaves at 05:40, would you like me to book that for you? Sentence4: I will be departing from Birmingham New Street on Tuesday. Sentence5: The price is 75.10 pounds and it is a 163 minutes ride. Can I help you with anything else? Sentence6: Please book 6 tickets and send me the reference number. Sentence7: No thank you. Please tell me about the ticket pricing and time of travel Sentence8: Okay, the postcode is cb11ly. What else can I help with? Sentence9: No, not yet. I just need the postcode. Sentence10: Thanks for using Cambridge TownInfo centre. Have a great day! Sentence11: I'm looking for a train that goes to Cambridge and arrives by 08:45. Sentence12: The Gonville Hotel will meet all of your needs. Would you like me to book it? Sentence13: I found two expensive hotels, one in the centre and one in the south of town. Do you have a preference? Sentence14: Again, 3 star with free wifi. I don't care about the price. It has to be in the centre, though. Sentence15: That is all, thank you for your help today. Sentence16: Yes please. I need a 3 star hotel that offers free wifi Sentence17: I found 231 trains that fit your request. Where will you be departing from? Sentence18: What price range and what star rating are you looking for ? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Okay. How about TR8730, which would depart at 05:40 and arrive by 08:23? Sentence2: TR8730 has a fare of 60.08 GBP, the trip is 163 minutes, and it departs at 05:40. Would you like to book tickets? Or can I help you with anything else? Sentence3: Great, that's all I need, thanks so much for your help! Have a great day! Sentence4: I have booked that for you, reference number is ZB89D8NC . Do you need anything else? Sentence5: Sounds good. Please, may I have the price, travel time, and departure time? Sentence6: I'll depart anytime as long as I can get to Cambridge by 08:30. Sentence7: I also need to book a train for my trip to Cambridge. Sentence8: Yes, please. I need a reservation for 7 people at 5:15 on Sunday. Sentence9: I will be leaving from Birmingham New Street on Sunday. Sentence10: Where will you be departing from? And what day would you like to travel? Sentence11: Would you like to specify a departure or arrival time? Sentence12: I have 3, the gandhi is a great place. shall I book a table for you? Sentence13: Does Cambridge have an Indian restaurant in the Centre of town? Sentence14: You have a great day as well. If you need anything else, please do not hesitate to call back. Goodbye! Sentence15: I need a cheap one. Sentence16: I have 9 indian restaurants. Do you have a price range in mind? Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]:
Answer: (B) System