You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I can help you with that. Where are you leaving from and going to? Sentence2: There are 15 restaurants in the city centre that are in the cheap price range. What type of cuisine would you prefer? Sentence3: Great! Enjoy your visit and have a good one. Sentence4: That doesn't matter. The 18:16 will do. Book it for 4. Sentence5: Thank you so much for your help, that's all I need today. Sentence6: I'm looking for a restaurant in the center, but on the cheaper price range, can you help me? Sentence7: Actually, no booking is necessary. But, can you suggest one and provide me the address. Thanks. Sentence8: I'm leaving from Norwich and heading for Cambridge. Sentence9: Your ticket booking was successful and the total fee is 70.4 GBP payable at the station . Your reference number is : 72SA1578 . Is there anything else I can help you with? Sentence10: Trains leave hourly from 5:16 am till 18:16 pm. The 18:16 pm train arrives at 19:35. The fare is 17.60. What time would you like to leave? Sentence11: Great thank you, I also need a train to arrive by 20:15 and traveling on monday. Sentence12: I recommend the golden house. The address is 12 Lensfield Road City Centre. Sentence13: I have three. Shall I try to book one? Sentence14: I will prefer restaurant that serve Chinese food. Question: Who has spoken the sentence 6? (A) User (B) System
Output:
Answer: (A) User