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

[Q]: Sentence1: Hi. Can you please help me find a restaurant that serves food from singapore ? I'd like it to be on the East side of town if possible. Sentence2: Thank you for using the Cambridge restaurant system. Goodbye. Sentence3: Yu Garden is located on the east part of town. Would you like the telephone and address? Sentence4: What is the address, phone number, and postcode? Sentence5: Can you help me find some Chinese food then? Sentence6: There are no restaurants serving Singaporean food on the east part of town. Sentence7: Thank you, goodbye. Sentence8: Yu Garden is located at 529 Newmarket Road Fen Ditton, C.B 5, 8 P.A, and the number is 01223 248882. Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System


[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
[A]: Answer: (B) System


[Q]: Sentence1: There are many trains available. TR5173 leaves at 08:21 and arrives at 10:06. Would you like me to book that for you? Sentence2: I need to go to leicester from cambridge, and i need to leave on sunday. Sentence3: OK I booked that for you. The total fee is 90.72 GBP and your Reference number is : AVE1068H . Sentence4: Okay thank you for calling. Sentence5: Thanks so much. I appreciate the help. Have a nice day. Sentence6: Great can I get TR5173 booked for 3 people please? Sentence7: I need to find a train departing from Cambridge that arrives at 18:00 Sentence8: What are the other requests? Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User