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

Q: Sentence1: You're very welcome! Is there anything else that I can help you with today? Sentence2: That is all I will need. Thank you for your help! Sentence3: Please book for 4 people at 17:00 on Sunday Sentence4: Thank you for all your help. Sentence5: I need a restaurant. The restaurant should serve indian food and should be in the expensive price range. Sentence6: I will be departing from my house. Sentence7: Pipasha Restaurant fits all of your criteria. Would you like to book a stay? Sentence8: Yes, I'd like a taxi to take me to Pipasha Restaurant and then to Cambridge Punter. I'd like to arrive at Pipasha Restaurant by 17:00. Sentence9: There are 14 expensive indian restaurants in the city. Do you have a preference of location? Sentence10: I am also interested in attractions in the centre. Specifically, I am interested in multiple sports facilities Sentence11: Your table for 4 has been booked. The table will be reserved for 15 minutes. Your reference number is 8OZ8ZF5G . Do you need anything else? Sentence12: The Cambridge Punter looks like a good choice. Want more information? Sentence13: Actually I'll be at the Cambridge Punter, pick me up there. Sentence14: Yes.East-Side London. Sentence15: How about an attraction that has to do with boats? Sentence16: The phone number to the cambridge punter is 07807718591. Do you require assistance with anything else. Sentence17: I have none available in the centre. Would you like a different area or attraction? Sentence18: You are welcome. Please call us back if we can help you any further. Sentence19: What is the address of your house so I can book the taxi? Sentence20: I just need to know where you will be departing from at first to the restaurant. Sentence21: No problem. Your taxi is booked. The car is a red tesla and the contact number is 07610839736. Anything else I can help you with? Sentence22: Yes, can I get the phone number? Question: Who has spoken the sentence 17? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: Okay that is all I needed. Sentence2: Can you help me find a hospital close by for an injury I have? Sentence3: The address is Hills Rd, Cambridge and Postcode is CB20QQ. Sentence4: I have information for Addenbrookes Hospital at Hills Rd, Cambridge. If you have a certain department you would like to contact, I can get that number for you. Sentence5: Okay. Glad I could be of help. Sentence6: I just need the adress and the postcode if you have it. Question: Who has spoken the sentence 1? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: I need to book it for 5 people. Sentence2: I recommend Clare Hall. It is free admission, and the address is Herschel Road, CB39AL. Sentence3: I have a train on Tuesday that arrives at 18:07. I believe that would suffice? Sentence4: Book me a train from bishops stortford that arrives by 18:30. Sentence5: Thank you for calling. Have a great day and a fantastic trip to Cambridge. Goodbye. Sentence6: are you sure? i need to leave tuesday. Sentence7: There are a lot of great places to go in the west - museums, colleges, entertainment venues - what would you like to do? Sentence8: Colleges are find, can you recommend one and give me the postcode, address and entrance fee? Sentence9: I need the train to leave on tuesday and go to cambridge. Sentence10: There are no trains on Tuesday. Sentence11: Can you book it for me and get a reference number ? Sentence12: Your booking on TR1772 was successful. The reference number is YV3K20RP . The total fee of 50.5 is payable at the station. Sentence13: The only entertainment venues that I can find are colleges in the West. Is there another area you would like me to search? Sentence14: Yes I am sure. Can you change your criteria? Sentence15: You're welcome! Is there anything else I can help you with? Sentence16: I can do that for you. Can you tell me how many tickets you need to book? Sentence17: Also looking for place to go in the west. I need the postcode, address and entrance fee. Sentence18: Would you choose an entertainment venue for me? Museums and colleges seem so boring. I will need the address, postcode and entrance fee, please. Sentence19: OK, the TR0201 arrives at 18:07. Would you like to book that? Sentence20: No, I can not do that. Sentence21: That is great, thanks for your help. Sentence22: No, I think I have everything I need. Question: Who has spoken the sentence 12? (A) User (B) System

A:
Answer: (A) User
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