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

Example Input: Sentence1: The post code is cb23dz. Sentence2: I need to arrive at 17:45. Sentence3: I will travel Tuesday. Sentence4: Thats perfect. What is the price and travel time on this train? Sentence5: I also need a train, to cambridge, I want to arrive by 17:45. Sentence6: There's a train that leaves at 13:17, want that one? Sentence7: What day do you need the train? Sentence8: Can I help you with anything else? Sentence9: Is there a time you need to leave or arrive by? Sentence10: It is 17.90 pounds and takes 60 minutes. Would you like me to book this for you? Sentence11: No thanks, just gathering information, that is all I need. Sentence12: That is all I needed today. Sentence13: Could you please provide me with the postcode. Thank you! Sentence14: As long as it arrives in Cambridge by 17:45 and departs from Broxbourne that will work. Sentence15: Glad I could help come backk if you need anything else Sentence16: I am looking for information about the museum of archaeology and anthropology. Sentence17: I have one arriving at 7:32 will this work for you? Sentence18: That museum is located over at University of Cambridge, downing street. It's free to visit. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Goodbye. Sentence2: Nandos sounds great. Thank you. Sentence3: Goodbye. Sentence4: thank you good bye Sentence5: Yes, I'd like a restaurant that serves portuguese food. Sentence6: nandos is the only restaurant i can find in the south that serves portuguese. Sentence7: Hi. I'm trying to find a good restaurant in the south part of town. Sentence8: There are several good restaurants in the south part of town. Do you have a preference for the type of food or price range? Question: Who has spoken the sentence 2? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I am looking for a particular hotel. Its name is called autumn house Sentence2: Thank you goodbye Sentence3: Could you try Wednesday, instead? Sentence4: You're welcome. Thank you for calling and goodbye. Sentence5: That's for 8 people and it's for 2 nights. Sentence6: Booking was successful. Reference number is : 3H0WHD4Z . Sentence7: No thanks. Would you book the Autumn House for me starting on Monday, please. Sentence8: I'm sorry, your booking was unsuccessful. Would you like to book another day or a shorter stay? Sentence9: How many people would be staying and how many days will you be staying? Sentence10: I have the Autumn House. It is at 710 Newmarket Road. Would you like the phone number? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output:
Answer: (B) System