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

[Q]: 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
[A]: Answer: (A) User


[Q]: Sentence1: Booked! You leave at 13:17, your reference number is 3WICPFQP, you will pay 141.6 at the station. Sentence2: I am looking to book a train. Sentence3: Could you tell me your location, which area of town or what business you are departing from? Sentence4: Certainly. May I ask where you want to depart from? Sentence5: I need to depart from London Kings Cross and go to Cambridge. Sentence6: We are leaving London Kings Cross and need to do so after 12:45 on Friday for 6 people and can I get the reference number for the booking? Sentence7: Okay thank you. That is all I need. Sentence8: Okay thank you for calling. Sentence9: I would like to leave from the closest station to my location. Sentence10: To clarify, are you looking for a train to Cambridge? All Friday trains from London Kings Cross go to Cambridge. Question: Who has spoken the sentence 8? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: I believe you meant 10:00, so I went ahead and made the reservation for that time. The reference number is HRPLZ9AQ . Sentence2: I'm sorry but there aren't any Malaysian places of any price in town. Would you like to try a different cuisine? Sentence3: That time slot is not available, would you like to try another time. Sentence4: Chinese sounds good. Can you give me any suggestions? Sentence5: How about !0:00 instead, is that available Friday? Sentence6: Well I need it to be in the south of town. Sentence7: Yes, I would recommend the Peking Restaurant, located at 10 Homerton Street City Centre. Could I reserve a table for you? Sentence8: Thanks, that's all I need. Sentence9: Sounds great. Make a reservation for 4 on Friday at 11:00. Sentence10: I'm looking for a place to eat. I want expensive malaysian food. Can you help? Sentence11: On the south end, in the expensive price range, we have Mexican, Italian, Indian, and Chinese foods to choose from. Do any of these sound good? Sentence12: You're welcome! Enjoy your meal! Question: Who has spoken the sentence 7? (A) User (B) System
[A]:
Answer: (B) System