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: 4 people please. Sentence2: What area is it in? Sentence3: I'm looking for a hotel to stay in. I prefer something in the expensive price range, and also one that offers free parking. Sentence4: I also need a train going to Leincester from Cambridge. I want to leave on Monday and arrive at 13:00. Sentence5: Booking was successful. Reference number is : H9CE5KK3 . Can i help you with anything else? Sentence6: The gonville hotel is in the centre area and the lensfield hotel is in the south area. Would either of these hotels work for you? Sentence7: The gonville hotel may be a good option. Sentence8: Which day would you be arriving at the hotel, and how long will you be staying? Sentence9: yes can you please. thank you Sentence10: In that case, you'd prefer The Lensfield. Do you need to book a room? Sentence11: Wednesday for 4 people, just one night. Sentence12: i want the one in the south Sentence13: I'd like a place with 3 stars. Sentence14: The Lensfield Hotel or Gonville Hotel both meet your criteria. Would you like me to make a reservation for you at either option? Sentence15: How many tickets do you need? Sentence16: Your tickets have been booked. Your reference number is 6F8IVDHH . Question: Who has spoken the sentence 4? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: Reference number is 29IN9CT3 for the acorn guesthouse. Sentence2: Sounds great if it is portuguese. I'll take a reservation for 7 people at 20:00 for the same day. Sentence3: Okay, how about the Acorn Guest House in the north? Sentence4: There is. How does Nandos City Centre sound? Sentence5: Okay, it was my pleasure to assist you! Bye! Sentence6: No, that's all I needed today. Thank you for your help! Goodbye! Sentence7: do you have one the is portuguese food ? Sentence8: I'm looking for information on 4-star rated guesthouses in Cambridge Sentence9: You're all set. Your reference number is 6R5W1RRE and your table will be reserved for 15 minutes. Anything else? Sentence10: I suggest the dojo noodle bar, an asian oriental restaurant, would you like to make a reservation? Sentence11: Sure. Can we spend 5 nights starting on Sunday? I am going to need room for 7 people. Sentence12: I have a number of 4 star guesthouses available, would you like to book one in a particular area? Sentence13: I would also like to eat somewhere cheap in the middle of town. Sentence14: Not really. Could you suggest one with free parking? Question: Who has spoken the sentence 7? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: TR0060 leaves at 19:29 and arrives by 20:07. Does that work for you? Sentence2: I'm leaving from Bishops Stortford on Thursday. I'd like to leave after 18:30. Sentence3: Your reference is TTZCS4Y4, is there anything else you need? Sentence4: I am planning to visit Cambridge soon and need schedule information. Sentence5: No, that is everything I needed. Thank you. Sentence6: Can we try for 1 night instead of 3? Sentence7: Unfortunately they are all booked for that duration. Would you like to try another hotel? Sentence8: That's OK, I won't have a car with me. Can you book the Avalon for 3 people for 3 nights, starting Thursday? Sentence9: I am happy to help, when will you be traveling and where will you be coming from? Sentence10: Yes, those times are good for me. Would you give me the price and train ID, please. Sentence11: The Avalon is a 4 stars guesthouse in the north, the price is moderate. There is not free parking in this hotel. Sentence12: Thank you for contacting Cambridge TownInfo centre. Have a great time! Goodbye! Sentence13: The train id is TR0060 and the price is 10.10 pounds. Would you like me to book that for you? Sentence14: Not at this time, thanks. But I would like to look for some hotel information. A friend told me to check out the Avalon. What can you tell me about it? Question: Who has spoken the sentence 9? (A) User (B) System
Output: Answer: (B) System