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

[Q]: Sentence1: Thanks! I'm all set now. Bye! Sentence2: i am looking for a place to stay. The hotel should have a star of 4 and should include free wifi. Sentence3: I have several, when is your stay? Sentence4: A white bmw is booked for you. The contact number is 07793421858 Sentence5: There are 21 options. What type of food do you like? Our restaurants are quite diverse. Sentence6: a and b guest house is very nice Sentence7: Okay, now I would like to find a restaurant in the centre that is also in the moderate price range Sentence8: Yes it is in the moderate price range, what help can I help with? Sentence9: Ah, it was just a temporary lapse, it is back up now. I have you booked. The reference number is K9PYGG5A . Sentence10: Booking was successful. Reference number is : ZCRPOLK8 . anything else? Sentence11: Yes! What do you mean it's down? I need a place to eat! Sentence12: Choose one and surprise me. And book it for 6 people on thursday at 13:15. I'll need the reference number Sentence13: I'll need it to pick me up from the hotel and arrive at the restaurant at least 10 min before our reservation? Sentence14: You are welcome and good bye Sentence15: What is the name of the restaurant you booked the reservation at? We will also need a taxi to get there from the guesthouse. Sentence16: It was restaurant one seven, what time would you like that taxi? Sentence17: Can you confirm a and b guest house is in the moderate price range, please? Sentence18: It appears our booking system is down. Is there anything else I can do for you? Sentence19: book for 6 people and three nights starting on thursday. Sentence20: Do you have one that is a guesthouse? Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Booking was unsuccessful. Do you have a different time preference? Sentence2: Is it in the expensive price range? Sentence3: Yes book a table, thank you. Sentence4: I was happy to help, enjoy your meal. Sentence5: Sure, try booking that one for the same people, date, and time, please. Sentence6: Can you please give me a day and time that you would like to book a table for? Sentence7: No, that's all I need. Thank you for your assistance! Sentence8: I am looking for Korean food, in the Centre of town. Sentence9: No. How about finding another restaurant in the same area and price range. Sentence10: I've booked your table for 7 people on Monday at 13:45 at Kymmoy. Your reference number is 1MS5BUU6 . Is there anything else I can help you with today? Sentence11: There is one Korean restaurant in the centre, Little Seoul. Would you like the address and phone number? Sentence12: How about Kymmoy? It's an Asian restaurant in Expensive price range, located in Centre area. Sentence13: Yes, it is expensive. Are you interested in booking a table there? Sentence14: 13:45 on monday and a table for 7 please. I will need a reference number too. Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: You are welcome. Can I help you with anything else today? Sentence2: Hotel du vin and bistro serves european food in the moderate price range. It is located at 15 - 19 Trumpington Street. Would you like to reserve a table? Sentence3: Thank you for using are service and let us know if you have any future needs. Sentence4: I just want the reservation number for Friday please. Sentence5: I'd also like to line up a place to eat, if you could help me with that. Sentence6: No thank you. That will be all. Sentence7: Not really. Can you book one of them for Friday for me? Sentence8: We have 19 that match your search now. Do you have any other preferences? Sentence9: Thank you. How far away is the Restaurant from the hotel? Sentence10: Sure, for how many nights will you be staying? Sentence11: Sure thing! What type of cuisine are you looking for, what area of town, and/or what type of price range? Sentence12: I'd like a moderately priced European restaurant in the centre, please. Sentence13: I have booked a table for 3 at 11:30. Your reference number is OUR3L525 . Can I help with anything else? Sentence14: Yes, please. I need a table on Friday at 12:30 for 3 people, please. Sentence15: I'm happy to book that for you. I just need to know how many nights you'll be staying. Also, how many people? Sentence16: The hotel's address is 78-80 milton road. Sentence17: Sure, your room is booked, and your reference number is USB3QCDT . Is there anything else I can do for you? Sentence18: There are 21 hotels that meet your needs. Would you like to narrow your search by area and/or price range? Sentence19: I need a place to stay in Cambridge that is rated 4 stars and has free wifi. Sentence20: You are set. I have made you a reservation at the Limehouse for Friday night. Sentence21: I also need free parking. Do they have that? Sentence22: How about Friday at 11:30? Please include the reference number for the booking. Sentence23: 4 nights. 3 people. Please include reference number in your response. Sentence24: The booking was unsuccessful, would another day or time work? Sentence25: Thank you for all your help today. Sentence26: Thank you. Can I have the reference number for that reservation please? Question: Who has spoken the sentence 9? (A) User (B) System
[A]:
Answer: (B) System