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

Example Input: Sentence1: Hi, I am looking for a place to swim at in cambridge. Sentence2: The Yippee Noodle Bar is moderately priced. Would you like me to book you a table? Sentence3: That is all I need. Thank you. Sentence4: Thanks, also in the centre of Cambridge, could you find me an asian oriental place to dine? Sentence5: There are 4 options for asian oriental which range from cheap to expensive. Do you have a preference? Sentence6: May I have their phone numbers and the entrance fee for the pools. Sentence7: Unfortunately it is not available at that time or party size. Sentence8: I prefer moderate cost Sentence9: There are four, including parkside pools located in the centre. Sentence10: The number for parkside pools is 01223446100. You will need to call them to see if there is an entrance fee. Sentence11: You now have a 16:45 reservation for 7 at Yippee Noodle Bar. Your reference number is BOZ3MSRO . Sentence12: Let's try 16:45 then. Sentence13: You are very welcome. Goodbye. Sentence14: Yes I would like to book a table for 7 on Monday at 17:45 Question: Who has spoken the sentence 10? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Thank you so much. That is all I will need today. Sentence2: Great, how many tickets would you like to purchase? Sentence3: That would be perfect! Sentence4: I am looking to go from cambridge, and go on friday arriving by 14:30 Sentence5: Okay, how about the TR5901 leaving at 13:34 and arriving at 14:24 with a duration of 50 minutes? The cost is 16.50 pounds. Would that work for you? Sentence6: There are 266 trains going to Peterborough. Can you give me a departure day and time so that I can narrow down your choices? Sentence7: Your tickets are all booked, reference number R5P65TW5 Sentence8: I'd like to find a train to peterborough. Sentence9: Thank you for contacting Cambridge TownInfo centre. Have a wonderful day! Sentence10: 7 tickets please. Can I also have the reference number for the booking? Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I have no preference. Just find something in the centre of town. Sentence2: The latest train leaves at 23:39. Sentence3: Sure, their phone number is 01223452587. Is there any other way I can assist you? Sentence4: Trains leave London Liverpool Street every 2 hours beginning at 5:39. The latest leaves at 11:39 and arrives in Cambridge at 13:07. Sentence5: No that is all for today. Sentence6: I'm looking for a train going to Cambridge and arriving by 2:45 PM. Can you help me? Sentence7: I am leaving from London Liverpool Street on Wednesday please. Sentence8: I can help with that! What day would you like to depart? Sentence9: What is the ID for the train leaving at 11:39? Sentence10: Do you have a certain area or attraction you would like to see? Sentence11: the train id is TR4161. anything else? Sentence12: Yes, I am looking for places to go to in town. Can you help me? Sentence13: enjoy your time in Cambridge! Sentence14: Could I have their phone number please? Sentence15: Give me information on the latest one. Sentence16: I would like to recommend all saints church,it is beautiful architecture in the centre of town and no entrance fee. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output:
Answer: (B) System