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

[EX 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
[EX A]: Answer: (A) User

[EX Q]: Sentence1: How about TR9382? Sentence2: I would like to leave on Sunday. Sentence3: I think that'll work. I need to reserve two seats, can you help me with that? Sentence4: Booking was successful, the total fee is 7.04 GBP payable at the station. Reference number is : 6NJA0V8R . Sentence5: You're very welcome. Have a great day. Sentence6: Well I need to leave after 14:45, so if it is after that time that'll work. Sentence7: Thank you. That's all I need for now! Sentence8: Hi. I'm looking for a train from ely to cambridge, if there is one. Sentence9: TR9823 will leave at 15:35, how does that sound? Sentence10: Okay, what day do you want to leave? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: There are five moderate priced Italian restaurants is there any area you prefer to eat in? Sentence2: No, any area would work, is there one that is available at 13:15 on thursday? I need a reservation for two people. Sentence3: Great. You can help me pick out a restaurant go to. Sentence4: If you're certain then I guess not. Thank you for all your help. Sentence5: Are you certain the entrance fee isn't listed? Sentence6: I don't have any information on the entrance fee, but the phone number is 01223576412 and it is on Colville Road, Cherry Hinton. Sentence7: You're welcome. Have a great day! Sentence8: The Cherry Hinton Village Centre is the spot you're looking for. They're on Colville Road. Can I help you with any other info? Sentence9: I also want to find a multiple sports place in the east area. Sentence10: Yes, there are many great restaurants to chose from, what kind of food would you like? Do you have a price range? Sentence11: I've reserved you a table for 2 at one of my faves: Prezzo. Reference number OOAMXI99 . Can I help with something else? Sentence12: I would like to eat Italian food. I'm looking for something in the moderate price range please. Sentence13: Yes, I would like the phone number adderss and entrance fee. Sentence14: Yes I am certain, I am sorry. Is there anything else you needed to know? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System