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

Example Input: Sentence1: They are all moderately priced, but Avalon has free internet and four stars. Would that suit you? Sentence2: Yes, free wifi. No free parking though. Sentence3: That sounds good. Do they have wifi? Sentence4: Your table has been booked. The reference number is 3FOO64PM . Sentence5: Thank you I am also looking for a restaurant in the same area as the hotel serving expensive chinese food. Sentence6: please contact us again in the future. goodbye. Sentence7: There is Hakka located at Milton Road Chesterton would you like me to reserve it for you? Sentence8: I have three guesthouses to choose from. Do you mind they are in the north? Sentence9: I'm looking for a guesthouse to stay in and I don't need a free parking. Sentence10: 01223315702 and cb12dp. Sentence11: Perfect thats all I needed! Sentence12: This one is in the north a and b guest house Sentence13: Are there any moderately priced 3 star guesthouses in the west available? If not in the west, what about the north? Sentence14: Yes please. I need it for 8 people on Wednesday at 19:15. Sentence15: That's fine. Could I get their postcode and phone number? Sentence16: No that is okay, can you book the cheapest one for me please? Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: You have been very helpful. Thank you. goodbye. Sentence2: Yes I certainly can! Your reservation was successful and your booking reference is 5F3KBH78 . Sentence3: Can you make reservations for 6 at 14:30 on Thursday? Sentence4: The J restaurant serves cheap asian oriental food in the centre of town. Their phone number is 01223307581. The address is 86 Regent Street City Centre. Sentence5: Can you tell me about the J Restaurant? Sentence6: Glad to help. Have a great day and enjoy your meal. Good bye. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: No, thanks. That's it. Sentence2: Thanh binh is located in the west part of town and is in the cheap price range. Would you like their information? Sentence3: I would like Indian food. Sentence4: What about La Margherita? They serve Italian. Sentence5: thank you and good bye Sentence6: thanh binh is located at 17 magdalene street city centre and its phone number is 01223315232. Is there anything else I can help you with? Sentence7: Any type of food, just cheap in the west part of town. Sentence8: Is there anything else? Sentence9: I have nothing matching your request. Would you like to try another part of town or a different type of cuisine? Sentence10: Yes, please give me their address and phone number. Sentence11: Hi. Can you help me find an inexpensive restaurant on the West side of town? Sentence12: What type of food would you like? Question: Who has spoken the sentence 1? (A) User (B) System
Example Output:
Answer: (B) System