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

Example Input: Sentence1: Your table is booked (ref# SCHAG4OI). What time do you need that taxi? Sentence2: The phone number is 01223240089, and the post code is cb17sr. Is there anything else I can assist you with? Sentence3: Thanks. That is all for now. Sentence4: Aylesbury odge guesthouse,I will book it for you,is there anything else I can do for you ? Sentence5: Are any a guesthouse? Sentence6: Okay. Please call us if we can help you further. We hope you enjoy your stay. Sentence7: the good luck chinese food takeaway is great. Shall i book it ? Sentence8: No I just need you to recommend one for me. Sentence9: I don't need you to book it, I just need the phone number and post code please. Sentence10: Hello, I am looking for a place to stay that has free parking in the South area. Can you help me with that please? Sentence11: What time would you like to dine, and how many will be in your party? Sentence12: Thanks, also looking for a restaurant in the same part of town in the expensive range. Can you recommend one? Sentence13: I'd like it to arrive in time to get us there before 12:15. Sentence14: Yes I have 3 guesthouses matching your criteria. Would you like to book one of them? Sentence15: Your black ford taxi has been booked and your contact number is 07103139053. Sentence16: I have four options ranging in price from cheap to expensive ranging in from 3 to 4 stars. Sentence17: There will be 6 of us. We'd like 12:15 on Saturday please. Sentence18: Please book the restaurant and I also need a taxi. Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: The address for Little Seoul is 108 Regent Street, City Centre. Is there anything else I can help you with? Sentence2: Yes, I would like both the phone number and the postcode please. Sentence3: I'm looking for an expensive restaurant in the centre if you could help me. Sentence4: I got that backwards. Need a train leaving Kings Lynn after 9:15 and arriving in Cambridge sometime on Saturday. Sentence5: There is a Korean restaurant called Little Seoul located at 108 Regent Street City Centre. Would you like their phone number? Sentence6: TR2514 leaves at 10:11 and arrives at 10:58. Will this one work for you? Sentence7: Sure. Could you tell me the exact travel time? Sentence8: Sure. The travel time for TR2514 is 47 minutes. Anything else I can help you with today? Sentence9: I sure can. There are lots of choices. Are you looking for a particular type of food? Sentence10: Have a wonderful day yourself. Goodbye. Sentence11: Can I also have the address please? Sentence12: that is it for today. good day thank you Sentence13: I also want to see the travel times for a train going from Kings Lynn from Cambridge on Saturday. It should leave after 09:15. Sentence14: Is there a time you would like to arrive by? Sentence15: The phone number for little seoul is 01223308681, postcode cb21dp. Can I help you with anything else today? Sentence16: No, not really. I think I'd like to try something different. Could you suggest something? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I will be traveling to Cambridge and I'm excited about seeing local tourist attractions. Sentence2: I'd like a taxi please. It should pick me up at 15:30 from The Byard Art and drop me off at the hotel. Sentence3: Thats it, thanks so much! Sentence4: Your booking was successful. Your reference number is S56D4VON . Can I assist you further today? Sentence5: The area is flexible. But I am looking for something with a 3-star rating that offers free wifi. Sentence6: Sure. I need rooms for 7 people for three nights starting Thursday. Sentence7: Great! There are many wonderful tourist attractions in Cambridge. Is there a particular type of attraction you are looking for? Sentence8: Not in particular. Please recommend one and provide the area and entrance free. Sentence9: Glad to be of service. Sentence10: I would like to visit a museum. What do you suggest? Sentence11: There are 23 museums. Is there a part of town you are interested in? Sentence12: I have 5 hotels that meet those specifications. Do you have a area in town in mind? Sentence13: Thanks! I would also like to find an expensive hotel. Sentence14: The Byard Art museum is free and is in the South. Sentence15: Gonville Hotel is a 3-star hotel that offers free wifi. It is located in the centre area. Would you like me to book that for you? Sentence16: A blue Lexus will come to pick you up. Their number is 07670314554. What else do you need? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output:
Answer: (B) System