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: Thank you. Could you please get me the phone number? Sentence2: Yes, I was wondering what the location is of Addenbrookes Hospital. Sentence3: no, that's all thanks Sentence4: That hospital is located on Hills Rd, Cambridge. Sentence5: Happy to help. Feel free to call back if any additional questions come up. Have a good day. Sentence6: The main hospital phone number is 01223245151. Were you looking for a specific department? Question: Who has spoken the sentence 4? (A) User (B) System

Output: Answer: (A) User

Input: Consider Input: Sentence1: I am having difficulty booking either of the. Can you find another day or time that would suit you? Sentence2: Absolutely. Can I suggest the Warkworth House at a moderate price range, or the Autumn House at a cheap price range. Do either of these interest you? Sentence3: OK, you're all booked for 3 nights at the Warkworth House, starting Thursday. Your reference number is AC1NVW47 . Can I help with anything else today? Sentence4: I would consider both. I need to book for three people and 5 nights starting on Thursday. Can either of them offer that? Sentence5: There are 6 possible places that fit your request. Would you like more information or to add additional search preferences? Sentence6: Good Afternoon, I am looking for a place to stay on the east side in a guest house Sentence7: Can you see if any of them offer free parking? Sentence8: You're welcome. Goodbye! Sentence9: I really need to stay during that time frame. Would you mind checking again? Sentence10: No, that will be all. Thanks! Sentence11: Honestly, any price range will do. Can you suggest one for me and help me with booking a room? Sentence12: 5 of the guesthouses offer parking. What is your price range preference? Question: Who has spoken the sentence 9? (A) User (B) System

Output: Answer: (B) System

Input: Consider Input: Sentence1: I am looking for a restaurant that serves british food in the west area. Can you locate one for me please? Sentence2: Thank you! That's all I need from you today. Sentence3: Okay I booked you into an Indian restaurant that is moderately priced called Prezzo and your reference number is TMT76MHK . Sentence4: I would like to get information about moderately priced. Sentence5: There are 3 results for restaurants in the west that serve British food. Do you prefer moderately priced, or expensive? Sentence6: I need something else in the West, moderate priced. Sentence7: Okay. Do not hesitate to call us again if you need anything else. Sentence8: I have st johns chop house within the moderate price range. Can I book it for you? Sentence9: Can you check to see if booking is available for 5 people at 19:30 on Sunday? Sentence10: Sorry, but there is not space for 5 people. Can I search a restaurant in the north? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User