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

Example Input: Sentence1: Have a good day! Sentence2: No thank you, that is all. Sentence3: I am looking for a train to London Kings Cross that departs after 08:15. Sentence4: The TR2000 leaves cambridge going to london kings cross on friday at 09:00. It arrives in london kings cross at 09:51. How does that sound? Sentence5: Yes. What do you have available? Sentence6: Are you departing from cambridge station? Sentence7: I'll be travelling on a Wednesday. Sentence8: That's great. Please book me two tickets. Sentence9: The booking was successful and the fee is 47.2 GBP payable at the station. Reference number is E2N0JHSY . May I assist you with anything else today. Sentence10: What day would you like to travel? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: the post code is cb41er. what day would you like the reservation for? Sentence2: You're quite welcome. Thanks for contacting the Cambridge TownInfo Centre and have a great day! Sentence3: The Ashley Hotel sounds fine, can you book that for me please. Also, I need the postcode of that hotel as well. Sentence4: I'm looking for a hotel in the north side. Sentence5: Ashley Hotel and Lovell lodge are both available Sentence6: Actually, I don't need a booking. Thanks. Have a nice day. Sentence7: I have many options in the north. All are in the cheap to moderate range. Do you have any further requirements? Sentence8: I'd like a 2 star hotel with free parking. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Okay glad I could be of help! Sentence2: Any would be fine. But I need to book a table for 8 people for Sunday at 12:15. Sentence3: Can you see if there are any that serve indian food? Sentence4: Sure as long as it's in the same area and price range. I need the reference number too please. Sentence5: Booking was unsuccessful at rice boat. Would you like to find another restaurant? Sentence6: Thank you, that's all I needed today! Sentence7: Okay I booked you at the Tandoori Palace and your reference number is NBLD7E0V . Sentence8: Unfortunately there aren't any restaurants that fit your criteria. Is there anything else that I can do for you? Sentence9: There are six restaurants, one in the moderate price range and the rest in the expensive price range. Which one would you prefer? Sentence10: I am looking to get some eritrean food in the west part of town. Question: Who has spoken the sentence 7? (A) User (B) System
Example Output:
Answer: (B) System