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

Example Input: Sentence1: Of course, silly me. I'd like to travel from Cambridge to London Liverpool Street on Saturday, and I need to get there by 19:00 please. Sentence2: Allright. TR0357 departs at 09:39. Would you like me to book you tickets? Sentence3: Thanks for the help, that's all for now. Sentence4: Sure! Their number is 01223227330. Sentence5: Well, I want to leave on Saturday. You tell me the best options. Sentence6: I would like to arrive by 19:00. Sentence7: A ticket from London Liverpool Street to Cambridge is 13.28GBP. Sentence8: I also need their phone number. Sentence9: Can you tell me where you are leaving from and going to? Sentence10: what days look like the best ones to get a great deal on hotel with train ride. Sentence11: Can you help me find a train for my upcoming trip to your city? Sentence12: Absolutely, the address is 15-19 Trumpington Street. Is there anything else I can assist you with today? Sentence13: Ok, I'll have to speak with my friend to see if that price is acceptable. Can I please get the address to the restaurant Hotel Du Vin and Bistro? Sentence14: There are 202 options that day! Do you know what time you want to leave or arrive? Sentence15: Can you give me the ticket price? Sentence16: I hope you have a good trip. Have a nice day. Goedbye Question: Who has spoken the sentence 1? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you for using this system Sentence2: There are several cheap restaurants located in the centre part of town. Sentence3: I am looking for a cheap restaurant. Sentence4: Yes, La Raza serves Spanish food. Would you like their phone number? Sentence5: Do any serve spanish food? Sentence6: La Raza is located at 4-6 Rose Crescent, their postcode is C.B 2, 3 L.L Sentence7: Thank you, goodbye. Sentence8: No, I would like the address and the post code please. Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Thank you for all your help! Sentence2: Do you need to arrive by a certain time? Sentence3: Thank you. Bye. Sentence4: I'm wondering if there are any boat attractions in town? Sentence5: I would recommend the riverboat georgina. The phone number is 01223902091 and the postcode is cb43ax. Do you need anything else? Sentence6: I booked you for 6 tickets on the 15:50 train that arrives in Ely at 16:07. your reference number for the journey is 3QK3PKJT . Sentence7: What are your departure and arrival stations, and what time of day would you like to travel? Sentence8: No as long as it leaves any time after 13:00 for 6 please and I need the reference number Sentence9: Yes, I'm also looking for a train for Tuesday. Sentence10: Could you please retstate when you would like to leave and arrive by? Sentence11: I am glad I could help. Have a good day and a fun trip! Sentence12: I am leaving from Ely and departing at 5. Sentence13: I have a number of trains available, what is your place of departure and your destination, please? Sentence14: I would like to leave by 17:00 Sentence15: There are 4 boat attractions in town. What part of town would you prefer? Sentence16: Thank you for contacting Cambridge TownInfo Centre. Have a great day! Sentence17: I'm so sorry. I need to leave Cambridge after 13:00 on Tuesday and I'm going to Ely. I need 6 tickets. Sentence18: It doesn't matter what area, I just need a phone number and postcode for one please. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User