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

Sentence1: Thanks! I've also heard about a little place in town called Autumn House. What can you tell me about it? Sentence2: Yes thursday and at 17:50. Sentence3: It'll be for 7 people, 2 nights, starting saturday. Sentence4: Can you book a room for me? Sentence5: I have you booked for 2 day for 7 people. Sentence6: i want to sight see in cambridge and want to see architectural stuff Sentence7: Autumn house is a guesthouse in the east area. Despite being rated at 4 stars prices are cheap compared to others. Interested in more info? Sentence8: Happy to be of service, and enjoy your time in Cambridge! Sentence9: That will be all. Thanks for your help. Sentence10: What area is all saints church located? Is there an entrance fee? Sentence11: What is the reference number for that booking? Sentence12: Your Reference number is 8J8MEI06 . Can I do anything else for you? Sentence13: sure for how many and when? Sentence14: I have some great sights for you. All saints church, great saint mary's church, holy trinity church, little saint mary's church and the old schools. Sentence15: All Saints Church is on Jesus Lane in the center of town. There is no entrance fee. Sentence16: Can you give me the number of days and people you would like to stay, please. Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User