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

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
Answer: (B) System

Sentence1: No thank you, goodbye. Sentence2: I'm sorry, there are no Korean restaurants in the north part of town. Can I help you find anything else? Sentence3: Thank you for using our system. Good bye Sentence4: How about any area? Sentence5: I would like a restaurant in the north part of town that serves korean food Sentence6: What is the address and price range? Sentence7: Little Seoul is at 108 Regent Street City Centre and is an expensive restaurant. Do you want the phone number? Sentence8: little seoul is in the centre and serves korean food Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System

Sentence1: That was all I needed. Sentence2: What area of town interests you most ? Sentence3: Yes, I would like to arrive by 20:15. Sentence4: Your ticket has been booked. Your reference number is 561MGK3J. Is there anything else I can do for you? Sentence5: i also want a train to take me to ely Sentence6: Any area is fine, as long as the place has free wifi. Sentence7: TR7355 arrives in ely by 18:07, or there is also one that arrives by 20:07. Would you like to book a ticket for one of these? Sentence8: Yes, I will also need free parking. Sentence9: Yes please. I need one ticket. Sentence10: Done! Your reference number is WTJER271 . Can I help you with anything else? Sentence11: Thank you for contacting us and have a nice day. Sentence12: Will you need free parking as well? Sentence13: Just check moderate price range then please! Sentence14: There are no hotels in the moderate price range with a 4 star rating. Is there another price range or star rating that you would like me to check? Sentence15: I would like my reservations to start on sunday. Sentence16: Ok! There are 10 trains; do you have a time preference? Sentence17: On what day do you need to go to Ely? Sentence18: Find me a place to stay. I need a hotel in the moderate price range with a star of 4. Sentence19: Thursday, please. I need to leave from Cambridge. Sentence20: We have the Ashley Hotel and Lovell Lodge that fit what you want, would you like me to book one for you? Sentence21: What day would you like you stay to start? Sentence22: Yes just for me. For four nights please Question: Who has spoken the sentence 4? (A) User (B) System

Answer: (A) User