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

Sentence1: There are 33 entries for expensive restaurants in the centre. Would you like to hear some options? Sentence2: As far as thai food goes, I happen to have one place. Good thing is they are very highly recommended. It is called Bangkok City. Would you like a reservation? Sentence3: Hello, I am looking for a restaurant. The restaurant should be in the centre and should serve modern eclectic food. Sentence4: Cambridge Contemporary Art is very nice. It's in the centre part of town, like the restaurant, and it's free to get in. Can I help you with anything else? Sentence5: No, that is all. Goodbye. Sentence6: Fantastic, can you also find me a museum attraction? Sentence7: Any type would be fine I just need to know the area and entrance fee of one you would recommend. Sentence8: Can you try booking at 15:45? Sentence9: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 1NY7QJKY . Sentence10: Are any of them modern eclectic food? Sentence11: Yes, I'd like to book for 2 people at 16:45 on tuesday. Sentence12: Okay. Have a lovely day then. Sentence13: Dang...How about some Thai food instead Sentence14: There are several wonderful museums in town. Is there a specific area you prefer? Sentence15: Are there any other expensive restaurants in that area that may be nice to visit? Sentence16: There are no restaurants in that are would you like to try a different area? Sentence17: No, there doesn't seem to be any modern eclectic places at all. Would you like a different type of cuisine? Sentence18: I'm sorry, but they seem to be all booked up at that time. Would you like to try a different day or time? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System

Sentence1: You have been very helpful. Thank you. goodbye. Sentence2: Yes I certainly can! Your reservation was successful and your booking reference is 5F3KBH78 . Sentence3: Can you make reservations for 6 at 14:30 on Thursday? Sentence4: The J restaurant serves cheap asian oriental food in the centre of town. Their phone number is 01223307581. The address is 86 Regent Street City Centre. Sentence5: Can you tell me about the J Restaurant? Sentence6: Glad to help. Have a great day and enjoy your meal. Good bye. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: I need a train. Sentence2: I have five hotels that match your requests. Sentence3: Okay, and where are you traveling to? Sentence4: I have 13 hotels in the north. What type of hotel did you want? Sentence5: Hey, I'd like to find a hotel in the north, today. Sentence6: Ok can you book that for me and get me a confirmation number Sentence7: I'm going to need more information than that. Where will you be departing from, and what is your destination? And do you have a date and time in mind? Sentence8: Okay. I would like to recommend the Acorn Guest House. Sentence9: Can I help you with anything else? Sentence10: There are a number of trains that leave after 15:45. The one closest to the time is TR1911 leaving at 16:11. What day would you like to travel? Sentence11: I want one with moderate prices that has free wifi. Sentence12: I made the booking for you. Your confirmation number is DN8DIW5T . What else can I do for you? Sentence13: Your 1 ticket booking on the TR1911 train was successful, the total fee is 9.8 GBP payable at the station. Your Reference number is : O8BN9KXH . Sentence14: You have all the information you need. Sentence15: Do they include wifi? Sentence16: i'm traveling to kings lynn and need to leave after 15:45 Sentence17: I'll need the to take the train on Tuesday. I'll need it for the same number of people as my hotel reservation. Sentence18: Thank you for contacting us and have a nice day. Sentence19: i will be leaving from cambridge after 15:45 Sentence20: Is there anything else I can help you with today? Sentence21: May i please have your details (Name, ID, Phone number, email) so i can go ahead and make the booking for you? Sentence22: That will be all. Thank you for your help. Sentence23: I am open to any hotel that matches my requests. I need it booked for 1 person, 3 nights starting thursday Sentence24: Yes all of them do. May I recommend something to you? Question: Who has spoken the sentence 23? (A) User (B) System

Answer: (B) System