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

Example Input: Sentence1: What area would you like to stay in? Sentence2: I need it for 7 people. 5 nights starting Sunday. Sentence3: Which of the 2 hotels should I book for you? Sentence4: Are there any amenities that you are looking for? Parking? Internet? Sentence5: TR2021 is leaving at 20:24 would that work for you? Sentence6: I don't really have a preference for area. But I would like it to be a hotel rather than a guesthouse. And I would love free parking. Sentence7: I'd like free parking. Sentence8: How about the Ashley Hotel? Sentence9: Booking was successful, the total fee is 56.56 GBP payable at the station . Reference number is : EZIAXWCQ . Can I help you with anything else? Sentence10: Great! I'm glad I could be of help. Have a good day. Sentence11: We have ashley hotel and lovell lodge, shall I book you for one of the two? Sentence12: I am also looking for a train departing from stansted airport going to cambridge on sunday. I need to leave after 19:30. Sentence13: I'm looking for a place to stay in Cambridge, moderate price for a hotel. Sentence14: Yes, please make a booking for my group. We'll all be traveling together. Sentence15: Thank you that is all I needed today. Sentence16: Booking was successful. Reference number is L1S8JNAC . Do you need anything else? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: The phone number for pizza hut cherry hinton is 01223 323737 and they are located at G4 Cambridge Leisure Park Clifton Way Cherry Hinton. Sentence2: There are two restaurants: Pizza Hut Cherry Hinton and Restaurant Alimentum. Sentence3: No, there are only 2 restaurants in the area. Is there anything else I can help with? Sentence4: Give me the address and postcode of any of them, please. Sentence5: That's great. Thank you so much Sentence6: What kind of food do you want? italian or modern european? Sentence7: The postcode is C.B. 1 7 D.Y Sentence8: Is there anything else available? Sentence9: Hello, I am looking for a moderately priced restaurant in the south part of town. Sentence10: I do not care. Sentence11: What is the postcode? Sentence12: You're very welcome. Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Booking was successful. Reference number is : 40GGN5EY . Is there anything else I can assist you with? Sentence2: sure, its moderate, phone is 01223500005 and the postcode is cb11ln, anything else? Sentence3: On wednesday please Sentence4: can you book me at Ashley Hotel for 1 and 3 nights ? Sentence5: Thank you, that'll be all today. Sentence6: There are two hotels that match what you're looking for. The Ashley Hotel and Lovell Lodge. Does either of those sound preferable? Sentence7: Yes, I'm also looking for some information on a restaurant called Efes. I'll need the phone number, price range, and postcode, please? Sentence8: I am looking for a moderately priced hotel in Cambridge. Sentence9: I have three choices for you. Do you have an area that is more convenient for you? Sentence10: No problem! What day are you wanting to check in? Sentence11: Yes, can you check the north please? Sentence12: If the hotel and restaurant are all you need for today, then thank you for contacting Cambridge TownInfo centre. Goodbye. Sentence13: Yes that's what I already asked you to do. Sentence14: Would you like me to book it for you? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output:
Answer: (B) System