You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I would suggest the funk fun house. Sentence2: There are lots of things to do, did you have an area preference? Sentence3: that is all i wanted for today thanks Sentence4: no area preferences really anywhere in town would be perfect. Sentence5: Booking was successful. Total fee is 123.2 GBP payable at the station. Reference number is E0JGKV67 Sentence6: Train TR6688 would work, would you like me to book you passage? Sentence7: I am gald i can help. enjoy Sentence8: Sure thing the address is 8 mercers row, mercers row industrial estate. In the east side of town and there is no info fee information. Sentence9: Can you recommend any kind of entertainment in town? Sentence10: That sounds great. I'll need the address, area, and entrance fee, please? Sentence11: I need to take a train into Norwich on Monday. Sentence12: We have 19 trains heading to Norwich on Monday. What would be your point of departure on that day? Sentence13: Cambridge, and I need to leave after 18:00. Sentence14: Sure, we have a group of 7 people. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User