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

[Q]: Sentence1: Can you tell me more about gourmet burger kitchen? Where is it? Sentence2: No, that's all I need for now. you've been very helpful. Thanks. Sentence3: They are in the towns centre. Expensive but worth every penny. Would you like to book a table? Sentence4: How about the postcode and attraction type for Byard Art? Sentence5: Thanks, I'm all done here. Sentence6: I have that table reserved. Your reference number is K94DWSQN . Can I help you with a taxi or hotel room? Sentence7: You're welcome. Have a great day! Sentence8: Unfortunately, we do not have information on several of them. But, Byard Art, Wandlebury Country Park, and Sheep's Green and Lammas Land Park are all free admission attractions. Sentence9: I have booked you a taxi that will get you there by 13:15. The car type is a blue Tesla and the contact number 07664553144. Can I do anything else? Sentence10: Enjoy yourself.You can call us if you need anything else Sentence11: no, not really. What are entrance fees on the 8 attractions? Sentence12: What can you tell me about attractions in the south part of town? Sentence13: I need a taxi from Byard Art that will get us to the restaurant on time. Sentence14: We have 8 attractions in the south part of town. Do you have a preference of type? Sentence15: Yes please, a table for 6 people at 13:15 on Tuesday would be amazing. Sentence16: Postcode, cb21sj, and the type is museum. Is there anything else I may help you with? Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: You are welcome. Have a great day. Sentence2: Thank you, that will be all. Sentence3: leave after 22:30 and dont care when i arrive Sentence4: Hello. Can you book a taxi for me? I need to travel from the Grafton Hotel Restaurant to Home From Home. Sentence5: No problem at all. What time do you want to leave and arrive by, respectively? Sentence6: Alright, I've got a white skoda coming to pick you up at the Grafton Hotel Restaurant at 22:45, your contact number for them is 07935014262. Question: Who has spoken the sentence 1? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: Yes, I'd also like to find an expensive restaurant in the west side of town. Sentence2: No that's all I need. Thanks for your help! Sentence3: Just pick one in the same area as Queens' College, and can you book a table for 1 at 18:30 on Saturday please? Sentence4: I certainly will. Thanks for the help that is all I needed. Sentence5: You're welcome. Enjoy your visit! Sentence6: Hi, what are some fun attractions in west Cambridge? Sentence7: There are 13 places, colleges, entertainment, and museums Sentence8: There are nine restaurants that fit your requirements. What type of food are you interested in? Sentence9: Your table at Graffiti is reserved for Saturday at 18:30 for one person. Your reference number is AV0KBAEG . Is there anything else I can help you with today? Sentence10: How about Graffiti? It's an expensive restaurant that serves British food in the west area. Sentence11: Graffiti sounds good. Can you book a table for me? Sentence12: Queens' College is a wonderful play to visit. Their address is Silver Street. The entrance fee is 2.50 pounds. Is there anything else I can help you with? Sentence13: Let us know if you need anything else. Sentence14: I need an attraction in the west part of town. Please provide the address and amount of the entrance fee so I can prepare. Question: Who has spoken the sentence 12? (A) User (B) System
[A]:
Answer: (A) User