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

Ex Input:
Sentence1: Thats all for today! Thanks so much! Sentence2: TR1039 departs from Ely at 13:35, arriving in Cambridge by 13:52. Does this work for you? Sentence3: Sounds great, can you book it for 7 people for 4 nights starting saturday? Sentence4: The location doesn't matter, but I'd like it to be 4 stars. Sentence5: Thank you I also need to find a cheap guesthouse to stay at. Can you help me find one? Sentence6: Hi, I'm looking for a train going to Ely from Cambridge. Sentence7: Have a nice day. Sentence8: Okay! How about Allenbell? Sentence9: That sounds great. I would like to book it for 7 people. I will also need the reference number Sentence10: You have 9 options available. Would you like to narrow it down by location? Sentence11: Your room has been booked. Your reference number is ELA3CIDM . Sentence12: There are 70 possible trips. You can leave as early as 5:35 and as late as 23:35. The trip is 17 minutes. What time of day would you prefer? Sentence13: I need to leave on Wednesday after 12:00 please. Sentence14: Booking was successful, the total fee is 35.2 GBP payable at the station .Reference number is : JD1P380X . Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: No that's all. Thanks. Bye! Sentence2: Yes, that's right. Which of the 12 options would you recommend? Sentence3: Yes, would you try 2 nights instead, please? Sentence4: That's great. Please make a reservation for 1 on Monday. I'd like to stay 3 nights. Sentence5: Your booking was unsuccessful. Would you like another day or a shorter stay. Sentence6: Are they expensive? I would like something nice. And do they have free parking? Sentence7: Please check for something expensive first. If you don't see one, then we can come back to that. Sentence8: Booking was successful. Reference number is : JAKCI7JO . Is there anything else we can help you with today? Sentence9: How about Archway House? It's at 52 Gilbert Road cb43pe, and the phone number is 01223575314. Would that work for you? Sentence10: Yeah, that's fine. Oh, and I need free parking! Sentence11: There is the Acorn Guesthouse that is located in the north side of town. Would you like me to make a booking? Sentence12: I hope you have a great rest of the day. Sentence13: Can you tell me about a nice guest house in your city? I don't care how much it costs. Sentence14: They're a moderate guesthouse with free wifi and parking. Would you like to book a room? Sentence15: So to clarify, you need a guesthouse with free parking, and a moderate price range is acceptable? If so, I have 12 different options for you. Sentence16: It looks like all of the places in the expensive price range are hotels rather than guesthouses. Would you like to consider a different price range? Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Ok, could you also give me the phone number and postcode for that? Sentence2: Yes that sounds lovely. Do any of those listed charge an entrance fee? Sentence3: Yes please make a booking for 7 people Sentence4: Great Saint Mary's Church charges a fee of 2 pounds, but it is the only church with a fee listed. Sentence5: I'm also looking for a train that leaves from Cambridge after 20:15 on Sunday going to Peterborough. Sentence6: I'm looking for an attraction in the center of town. Sentence7: The phone number is 01223350914 and postcode is cb23pq Sentence8: TR6958 leaves cambridge at 20:34. Would you like to book this train? Sentence9: Great thank you that should be all Sentence10: There are many churches in the center of town. Would any of those interest you? Sentence11: Fine. Your fee is 92.4 GBP payable at the station and your reference number is T6LUYKFN . Sentence12: You're welcome! Have a great day! Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System