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: Taj Tandoori is an expensive Indian restaurant in the South. Would you like more information on them? Sentence2: I'm looking for an expensive restaurant in the south part of town Sentence3: Thanks for your call. Goodbye! Sentence4: Thank you goodbye. Sentence5: May I have their address and phone number? Sentence6: chiquito restaurant bar is located at 2G Cambridge leisure park cherry hinton road cherry hinton. Its phone number is 01223400170. Would you like anything else? Sentence7: Yes. chiquito restaurant bar serves mexican food in the expensive price range and is located in the south part of town. Sentence8: Is there anything else? Question: Who has spoken the sentence 7? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: It is. How many people will there be and what time would you like on Wednesday? Sentence2: Okay I booked you into the J Restaurant that also serves Asian food in the cheap price range and your reference number is 7MUMBMFD . Sentence3: Is dojo noodle bar in the centre of town? I need something in that area, please. Sentence4: The booking was unsuccessful. Would like to book it at another time? Sentence5: The reservation needs to be for 2 for 17:00 on Wednesday evening. Do they have a table then? Sentence6: I need a cheap place to dine please. Sentence7: I don't care about the type of food. I need a reservation for Wednesday night. Sentence8: Thanks so much. That's all I needed. Sentence9: I can book you for dojo noodle bar, how many should I book for and what is the preferred time? Sentence10: No. It needs to be t 17:00. Another restaurant in the same area and price range would work. Sentence11: We have 22 inexpensive restaurants. What sort of cuisine would you like? Sentence12: You're welcome. Enjoy your day. Question: Who has spoken the sentence 11? (A) User (B) System
Output: Answer: (B) System