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: Sure, what area of town would you like to stay in? Sentence2: There are entertainment attractions in the east, south, and west areas. Which would work best? Sentence3: Any area is fine Sentence4: cherry hinton hall and grounds located in the east is a very nice place to visit. Sentence5: what is your price range to narrow down on our choices Sentence6: lovell lodge has a moderate price range. is that it? Sentence7: Sounds good, I will give it a try, can I also get a place ot stay with free wifi and parking? Sentence8: I am visiting Cambridge and want to see some entertainment. Sentence9: Preferably in the north. Sentence10: There are 2 hotels with 2 stars. There are also 9 guesthouses with 0-, 3- or 4-stars. Which do you prefer? Sentence11: I think I'd choose one of the hotels. Either is fine, could you recommend one? And give me it's price range? Sentence12: Yes that will be all, thank you. Sentence13: I'm open to any price range as long as it meets everything else I need. Sentence14: you are welcome any time Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System

Sentence1: There are many places to go in the centre. What type of activity would you like? Are you interested in activities that are free or cost money? Sentence2: El Shaddi meets all your criteria, how many people will I be making a booking for? Sentence3: As long as it is a guesthouse in town centre, and has free parking with 0 stars. I'd like to book for 3 nights starting Wednesday. Sentence4: Thank you for using our service! Sentence5: Sure, Club Salsa is located at 1 Station Road, CB12JB, and there is a 5 pound entrance fee. Sentence6: Are there any places to stay in the centre of town? Sentence7: I am also looking for places to go in the same area. Sentence8: We have 5 places to pick from in the centre of town, any other preferences? Sentence9: It should be a guesthouse, have 0 stars and include free parking. Sentence10: nah, i just realized i hate sports. a lot. how about nightclubs? Sentence11: You are in luck, we have 6 nightclubs. I'd recommend Club Salsa. Sentence12: I have the el shaddai located at 41 warkworth street. Would you like to make reservations? Sentence13: Great your stay is reserved! Reference CC8X41QU . Is there anything else I can help with? Sentence14: Great, thanks so much, that's all I need! Have a great day! Sentence15: I would like that for 4 people for 3 nights starting on wednesday please. Sentence16: I don't have any multiple sports attractions in the centre, but I have one in the East. Would you like to hear about it? Sentence17: Can I have the address, postcode, and entrance fee Sentence18: Mutliple sports would be nice. Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User