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

Ex Input:
Sentence1: Yes, that sounds great! Can I get it for 8 people for 3 nights please, we'll be arriving Tuesday. Sentence2: Great. Are there any trains that go directly from Cambridge to Norwich? Sentence3: Thank you for using our service. Have a good day. Goodbye. Sentence4: Yes, there are several. The trip time is 79 minutes and the cost is generally 17.60 pounds. Can I tell you anything else? Sentence5: I am looking for a guesthouse please. Sentence6: Would you like to try the Alpha-Milton Guest House located in the North? Sentence7: No, that's everything I needed. Sentence8: Any area as fine, as long as it has 3-star accommodations. Sentence9: How about for 2 days? If it's available will you please book and provide a reference number? Sentence10: I'm sorry, the hotel is unable to accommodate your party. Can you arrive on a different day or stay for a different number of days? Sentence11: In what area would you like it to be? Sentence12: I have successfully booked it for 2 days, and your reference number is OUKN0U42 . Question: Who has spoken the sentence 6? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: I would like a moderate price hotel in Cambridge. Sentence2: Either one is fine. I need to book it for 5 nights on Wednesday. There are 4 people. Sentence3: I'm not concerned about the area but it doesn't need to include internet. Sentence4: I will work on that and be back with you in a moment. Sentence5: Hi, I am planning a trip and could use some advice on a place to stay. Sentence6: There are two 2 star hotels in the north part of town. Ashley Hotel and Lovell Lodge. Both include free internet and parking. Do you have a preference? Sentence7: Sure. What is your price range and what side of town will you be interested in? Sentence8: I have some moderate priced hotels in the north and center. Do you have a location preference? Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: No thank you. I just need the price and travel time please. Sentence2: I'm looking for a hotel with a 4 star rating to stay at and I don't need to have internet. Can you help? Sentence3: They are the Huntingdon Marriott Hotel which is in the west area, and the University Arms Hotel which is in the Centre. Sentence4: The University Arms sounds good. Sentence5: Okay. Your booking was successful and your reference number is HLD21MYL . Sentence6: Thank you for calling today. Please let us know if there is anything else we can do to help. Goodbye. Sentence7: Would you like me to make a reservation for you? Sentence8: I have about 3 options that meet those requirements. All offer free parking and internet. 2 are expensive and 1 is cheap. Do you have a preference? Sentence9: I will be leaving Cambridge and arriving at Ely. Sentence10: What town are you leaving from? What time do you want to depart or arrive, please? Sentence11: We have 10 trains that match your criteria. The TR0996 leaves at 05:50 and gets to Ely by 06:07. Would you like to book you a seat on it? Sentence12: I'm glad I could help you today. Is there anything else you need? Sentence13: Sure! The travel time is 17 minutes and it costs 144.40 pounds. Sentence14: Perfect. You have been so much help! Sentence15: Thank you. That is all I need. Sentence16: Yes please, I also need a train to Cambridge, on Thursday. Sentence17: Tell me about the expensive options. Sentence18: I need it for 8 people, 2 nights from Monday. Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System