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

[EX Q]: Sentence1: The area doesn't really matter, can you pick a popular me for me? Sentence2: hmm, what about chinese food? Sentence3: You're all set! It's a grey volvo. If you need to contact the driver for any reason, the contact number is 07174343971. Sentence4: Yes, I'd like to take my husband there at 11:30 on Wednesday. Sentence5: Sure I've found an expensive place named yu garden in the east, would you like me to book something? Sentence6: Thank you, you were a great help. That's all I needed. Sentence7: have great day too Sentence8: welcome and have a great day Sentence9: Booked! The table will be reserved for 15 minutes. Your Reference number: 5R5C75ZP . Sentence10: Would you like me to reserve it for you. Sentence11: Sure. What time would you like to leave? Sentence12: I'd also like to book a taxi from the pool to the restaurant that arrives by the reservation time. Sentence13: Parkside Pools is centrally located and their address is Gonville Place. Is there anything else I can help you with today? Sentence14: i am looking for a swimming pool. Sentence15: I'll be going now. Good-bye Sentence16: As long as it arrives by 11:30 it doesnt matter when it leaves Sentence17: Sure, which part of town are you looking for? Sentence18: I'm looking for a sri lankan restaurant. Sentence19: Yes, please. I'll need the contact number and car type. Sentence20: I'm sorry. I'm not able to find anything that meets your criteria. Would you like to try a different type of food? Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I have information for the Parkside Police Station, is this close to your location? Sentence2: You're welcome. The police will help you immediately. Goodbye. Sentence3: Thank you for your help Sentence4: Please put me in touch with the local police, I was just robbed. Sentence5: The phone number is 01223358966 and the post code is CB11JG. Sentence6: I don't know, could you just give me the postcode and phone? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Great. I booked six tickets on TR4095 departing at 11:35 and arriving in cambridge at 11:52. Your confirmation number is W6PWPYOP . Sentence2: I need to book a train for Monday from Ely to Cambridge to arrive by 14:00 for 6 people. Sentence3: What time would you like to leave by? Sentence4: That is all I needed, good day to you. Sentence5: Anytime as long as i arrive by 14:00. Can you provide me with a reference number after booking? Sentence6: Have a great day! Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]:
Answer: (B) System