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

Example Input: Sentence1: Enjoy your travels! Let us know if we can be of any further assistance. Sentence2: TR8143 departs at 14:11 and arrives in Cambridge by 14:58, does this suit your needs? Sentence3: I need a train leaving from kings lynn. Sentence4: Yes, I'd like to travel on Wednesday, and I'd like to arrive in Cambridge no later than 15:30. Sentence5: There are no nightclubs in the west. Would you like to try another area? Sentence6: There are 133 trains leaving Kings Lynn, do you have a particular day you are traveling? Sentence7: They have free entrance. Their postcode is cb30ds. Sentence8: Could you look up a college instead then? Sentence9: I'm glad I could help. Sentence10: Churchill college is located in the west part of town. Sentence11: Yes it does. Can you verify the total travel time and price? Sentence12: Thank you goodbye. Sentence13: Thanks a lot, that's all. Sentence14: Sure - the travel time is 47 minutes, and the fee is 9.80GBP per ticket. Sentence15: I also need a nightclub in the west. Sentence16: Could you get me the postcode and entrance fee for there? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I am hoping you can help me with my planning. I am trying to find information on the trains. Sentence2: I would like to arrive by 13:15. Sentence3: Thank you that is all I needed. Sentence4: itshould be in the centre Sentence5: No. Can you help me find a very cheap, not shabby hotel that has free parking? Sentence6: Your booking has been changed. Your new reference number is FVTMM086 . Sentence7: I can definitely help you with that. Can you give me more information, like your departure and destination preferences? Sentence8: I have a lot of great choices to offer you. Do you have a preference to what part of Cambridge you'd like to stay in? Sentence9: Which one of them has free wifi? Sentence10: I will be departing from Stansted Airport to go to Cambridge on Wednesday. Sentence11: You're welcome, have a great day! Sentence12: There are two guesthouses: Alexander Bed and Breakfast, and El Shaddai. Would you like to stay in one of those guesthouses? Sentence13: I am getting the information up now, do you have a specific arrival or departure time? Sentence14: book for 2 people for 2 nights from wednesday Sentence15: Sorry, can you actually book it for 3 people for 2 nights, please? Sentence16: Both facilities do. Sentence17: TR6386 departs at 12:24 and arrives by 12:52. Would you like a ticket? Sentence18: I made your reservation for 2 people for 2 nights starting Wednesday at the Alexander Bed & Breakfast. Your reference number is 8JX02F2T . Is there anything else I can do? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: It will be dinner for 5 people. Sentence2: Anywhere is fine, it just needs to be moderately priced. Sentence3: I am interested in finding local Indian restaurants to visit during my trip to Cambridge. Sentence4: No actually I don;t need a reservation. I just need to find a hotel that is a guesthouse with free parking, and in the east and moderately priced. Sentence5: There are 24 guesthouses to stay at around town. What area of town and price range are you looking for? Sentence6: I also need a place to stay and should be a guesthouse Sentence7: Okay. Then I recommend curry prince in the east. Would you like a reservation there? Sentence8: I have four indian restaurants. Do you have a area of town in mind? Sentence9: Sure! How many people, what time, and what day? Sentence10: No, I only need one. Sentence11: Do you need to cancel the booking? Sentence12: Do you have a price range in mind? Sentence13: I have 4 at that price. 2 in east, 1 each in north and west. Any preferences? Sentence14: Can you make a reservation for me, please? Sentence15: Of course! What time would you like to dine? Sentence16: Have a nice day. Sentence17: No, any is fine really. Sentence18: It is in the East section of town. Sentence19: Moderate price range, please. Sentence20: you have a booking already for the Autumn House are you wishing to book another guesthouse? Sentence21: Booking your reservation was successful and your reference number is 47TOYZUY . Have you decided in which part of town you want me to find an Indian restaurant? Sentence22: 5 people and 4 nights. Sentence23: Okay, I recommend Autumn House. For the reservation on Friday, how many people will be staying and for how many days will you be staying? Sentence24: then Booking was successful.Reference number is : 47TOYZUY . Sentence25: There a 6 guesthouses in the east. Half of them are in the cheap range, and the other half moderate. What is your preference? Sentence26: I only need one booking. Sentence27: The price doesn't matter. But I need a reservation starting on Friday. Sentence28: thanks for your help. have a great day Sentence29: I am looking for a hotel in the east. Sentence30: Not yet. What part of town is it in? Question: Who has spoken the sentence 15? (A) User (B) System
Example Output:
Answer: (B) System