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

Input: Consider Input: 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

Output: Answer: (A) User

Input: Consider Input: Sentence1: You pick the area as I don't have a preference. Sentence2: I found swimmingpools in the areas of east, north and centre. Which would you prefer? Sentence3: I am departing from stevenage on thursday. Sentence4: Parkside Pools is located at Gonville Place. Is there anything else you would like to know? Sentence5: Parkside Pools is a great place located in the centre, would you like more information? Sentence6: Yes please. Get me the address Sentence7: The TR9547 gets into Cambridge from Stevenage at 20:43. Will that work? Sentence8: Have a great day! Sentence9: Yes, I just needed info for now. Thanks for your help. Goodbye. Sentence10: I need a train, on Thursday. Arriving by 2145. Sentence11: Where will you be departing from? Sentence12: i just want a place to go with a swimming pool. Question: Who has spoken the sentence 9? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: There are 5 trains that meet those requirements. TR5504 would have you arrive by 13:27. Can I help you buy a ticket? Sentence2: If you have no particular requirements, you might like the Autumn House, which is an inexpensive 4 star guest house on the East side. Sentence3: I want to book it for one person, four nights starting on Sunday. Sentence4: Yes it does. Sentence5: Does it include free internet? Sentence6: It doesn't matter, and I don't need internet access. Sentence7: Fantastic! Have a good day. Sentence8: I can't rest yet. I still need a train. I am traveling from Cambridge to London liverpool street. Can you help me out? Sentence9: Booking was successful. Reference number: 9COW8ZI5 . Is there anything else I can help you with? Sentence10: You can rest now, your reference number is BQ8VSRRZ . Is there anything else I can assist you with today? Sentence11: I'm exhausted. Can you find me a guesthouse somewhere on the east side of town? Sentence12: I'd need to leave on thursday and arrive by 14:30. Sentence13: No, that is all, thank you. Sentence14: Absolutely. First, I need a few more details. What day will you be traveling? Sentence15: Yes please for one. I will also need a reference number. Sentence16: Sure. There are both moderate and cheap priced guesthouses in this area. Which would you prefer? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User