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

Example Input: Sentence1: I'm sorry. I changed my mind. I don't want a guesthouse. Are there any hotels with 2 stars? Sentence2: Great that was all I needed today, thank you. Sentence3: Is there a particular area you would like to stay in? Sentence4: There isn't a guesthouse with 2 stars and free internet available. Is there another type of hotel I can look up for you? Sentence5: Great Glad I could be of help to you. Sentence6: I have you booked in the Ashley hotel. Your reference number is CW6YMT0B . Is there anything else I can do for you today? Sentence7: No, just any 2-star hotel with free wifi will do. Sentence8: Hi, I need a guest house please. Sentence9: Do you have a specific location you want to be? Sentence10: No, but I need free wifi and I would like a 2 star guesthouse please. Sentence11: I have 3 guesthouses all in the moderate price range. Would you like me to choose one for you? Sentence12: I found 3 for you all in the expensive price range. Can you please give me the details so that I may book it for you? Sentence13: Yes, how about a guesthouse with 3 stars and free wifi instead? Sentence14: I would like it for 6 people for 2 nights starting on Wednesday. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I'm sorry, but we just reserved your table. There is no car type. But since you ask, did you need a taxi? Sentence2: Thanks, that's all I need today. Goodbye! Sentence3: Could i please get the phone number and address? Sentence4: good day and thanks for using our services Sentence5: I only have one restaurant in the north for European food, but they have amazing food. It's called City Stop Restaurant. They are expensive but so worth it! Sentence6: book a table for 2 people at 13:15 on tuesday. Sentence7: I would like the north please. Sentence8: I am thinking I would like to try some european food while I am in town. Sentence9: Yes I need a taxi that will take me between the two places and need to arrive by 13:15. Sentence10: Okay. I have a taxi booked. It will be a yellow bmw and the contact number is 07135918917 Sentence11: The Botanical Gardens at Cambridge University are a favorite destination. The entrance fee is only 4 pounds. Sentence12: What is the car type, please thank you Sentence13: There are several to choose from, in which part of town would you like to concentrate? Sentence14: Sure, the phone number is 01223336265. The address is bateman street. Can I do anything else for you? Sentence15: Yes, I would like the information on parks that are located in the centre please. Sentence16: Your booking was successful! The table will be reserved for 15 minutes. Reference number is : ZLRYLH3O . Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: That's all I needed today. Thanks for your help. Goodbye! Sentence2: Okay, the three results are the same. I still recommend charlie chan. Do you need more help today? Sentence3: Yes, I'm also looking for a cheap Chinese food restaurant. Can you recommend one? Sentence4: I don't have a particular area in mind but I do also need free parking please. Sentence5: How about the hamilton lodge. It is in the north of town and meets your requirements including parking. Sentence6: I should have mentioned I am looking for a restaurant in the centre. Sorry about that. Sentence7: Sure, there are 4 options. I recommend charlie chan. would you like a booking? Sentence8: that sounds nice but will you book it for 7 people and 4 nights starting from wednesday Sentence9: Thanks for trying. Let's do Thursday, please. Sentence10: I would like a 3-star hotel with free WiFi, please. Sentence11: Booking is all set your ref number is 05MF6IQL Sentence12: I'm sorry, I am unable to book it for that time. Do you have another time that will work? Sentence13: Your booking was successful, the reference number is CUY4J5PR . Is there anything else I can help you with today? Sentence14: Yes, please book that restaurant for me. It'll be 7 people on wednesday at 14:45. I'll definitely need a reference number. Sentence15: Yes, there are 5 different options to choose from. What area will you be staying in? Sentence16: Thank you enjoy the rest of your day! Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User