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

Sentence1: 07426688661 is the contact number, I have you in a grey Toyota. Sentence2: Great. Can you tell me where you will be traveling to and from? Sentence3: I need to get there by 11:45. Sentence4: That's perfect, thanks! Sentence5: I need to book a taxi please. Sentence6: You are welcome. Thank you for calling us. Goodbye. Sentence7: Can I help you with anything else? Sentence8: No, that's everything. Goodbye. Sentence9: I want to go from wandlebury country park to huntingdon marriott hotel Sentence10: Okay, I will need some more information from you. What time would you like to leave? Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User

Sentence1: I have 23 places. What area would you prefer to be in? Sentence2: There is Cafe Jello Gallery in the west, Cambridge Artworks in the east and Broughton House Gallery in the centre. Does any of those sound appealing? Sentence3: Just the price range and postal code please. Sentence4: Cafe jello gallery postcode is cb30af and the entrance is free, is there anything else I can do for you? Sentence5: Here is the address 529 Newmarket Road Fen Ditton. Sentence6: Do you have an attraction type preference? Sentence7: You're welcome! Enjoy your visit! Sentence8: that is it. thank you for helping me Sentence9: Yes, I would like to see a museum. Can you tell me the postcode and entrance fee for it? Sentence10: I have no particular area preference. Can you list a few for me to select from? Sentence11: Yes could I have their postcode and entrance fee? Sentence12: Can you give me more information about Yu Garden. Sentence13: Of course! It is a chinese cuisine restaurant located in the east. Anything else you would like to know? Sentence14: I am traveling to Cambridge and excited about seeing local tourist attractions, can you help? Sentence15: I am also looking for the restaurant Yu Garden. Sentence16: Their price range is expensive and the postcode is cb58pa. Are you sure that is all you needed? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: I will be starting from Tuesday. Sentence2: I'm looking for a cheap guesthouse. Sentence3: No that is all, thank you! Sentence4: All set. Your reference number is ATMXXNQI . Sentence5: Would you like us to book a ticket for you? Sentence6: Before I can book it I need to know what day you will be staying? Sentence7: I have train TR2715 that leaves at 7:39 and arrives at 9:07. Sentence8: I also need a train for Tuesday that leaves London Liverpool Street and arrives in Cambridge by 16:15. Sentence9: Alright, have a lovely day! Sentence10: great, i have 9 options for you. Sentence11: Thanks! You're welcome, have a great day! Sentence12: Great. I need it for 7 for 5 nights. Sentence13: TR1395 arrives at 15:07. Sentence14: No, that's all I needed. Thanks! Sentence15: Would you like me to book anything else or provide anymore info? Sentence16: How about Finches Bed and Breakfast at 144 Thornton Road? Sentence17: I really prefer to stay in the west part of town. Do you happen to have anything in that area? Sentence18: Do you have a train less early? One that arrives around 16:15? Sentence19: great day and thanks for helping Sentence20: Thank you for your help. Question: Who has spoken the sentence 4? (A) User (B) System

Answer: (A) User