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

Example Input: 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
Example Output: Answer: (B) System

Example Input: Sentence1: Actually, I'm all set. Thank you! Bye! Sentence2: OK, great. will it be the same two people as on the train and starting on Monday? or do you have different needs for lodging? Sentence3: What is the price for that trip? Sentence4: Could you clarify if you need the reservation for 1 or 2 people please? Sentence5: Certainly, where will you be departing from? Sentence6: It look like the TR0532 is what you are looking for departing Bishops Stortford at 7:29 and arriving in Cambridge at 8:07. Would you like to book? Sentence7: The postcode for Worth House is cb41da and yes, it has internet! Sentence8: I would prefer the hotel be in the north part of town. Sentence9: I don't need to book today, thanks. Can you get me the postcode of one of them? Oh, and please make sure the one you choose has internet! Sentence10: Okay you sure you will not require a booking? Sentence11: I need a cheap hotel with free parking. Sentence12: The fare is 10.10 GBP per ticket. Sentence13: Okay let me see if I can book that for you. Sentence14: I need reservations for 2. Sentence15: Hi I am looking for a train to arrive in Cambridge by 08:15. Sentence16: Nope, same people. Sentence17: I've booked your tickets for the 7:29 train from Bishops Stortford, reference ZHT6R80S . Can you give me more information about the type of hotel you'd like? Sentence18: 1 person 5 nights please Sentence19: There are 10 total hotels, do you have a preference for area? Sentence20: I'd be happy to book that for you, what day will you be arriving on, and for how many nights? Sentence21: I'll be leaving from Bishops Stortford on Monday. Sentence22: I will go ahead an book at the Worth House. Sentence23: City centre north b and b and Worth house are both guesthouses and located in the north. Would you like me to book one for you? Sentence24: I need to make a booking for 2 people and can you find me a place to stay in the north? Question: Who has spoken the sentence 17? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: It's cb21sj. Anything else you need assistance with? Sentence2: Cambridge has 23 museums. What area of town would you like to go to one in? Sentence3: Great. Thanks. I'm also looking for a museum to check out. Can you help me with that? Sentence4: there are many. Where would you like to travel to? Sentence5: Booking was successful, the total fee is 80.8 GBP payable at the station . Reference number is : 3AWBI59X . Sentence6: Greetings, are there are any trains leaving bishops stortford. Sentence7: Certainly, the Byard Art is a museum in the south part of town. Their address is 14 king's parade. Would that work for you? Sentence8: Train 0277 leaves at 17:29 and arrives at 18:07. Would you like me to book you a ticket? Sentence9: That is all for today, you were very helpful. Sentence10: I need to leave after 16:30. Sentence11: Can you tell em the postcode as well please? Sentence12: Yes make a booking for 8 people and give reference number. Can you suggest places to go like museums in Cambridge? Sentence13: Can you find one in the south please? Sentence14: I would like to leave on thursday to cambridge. Sentence15: I have 10 trains leaving Bishops Stortford for Cambridge on Thursday. What time would you like to depart? Sentence16: Thank you so much! You have a wonderful day! Bye! Question: Who has spoken the sentence 15? (A) User (B) System
Example Output:
Answer: (B) System