Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: Can I have their phone number, please? Sentence2: Thank you very much. Sentence3: Primavera is a museum located in the center of town at 10 King S Parade and they do not charge an entrance fee. Anything else I can do for you? Sentence4: TR1731 will leave at 12:01, would that work for you? Sentence5: Hi, I am looking for a train. I need to depart from cambridge after 12:00. Sentence6: Yes sure it is 01223357708. Sentence7: Is there anything else I can do for you? Sentence8: That is all, thank you! Sentence9: Yes the travel time is 163 minutes and the price is 75.10 pounds. Sentence10: Ok. Thank you. Goodbye Sentence11: Yes can I get the travel time and price for that? Sentence12: I can look this up for you, I just need the date and where you will be going to. Sentence13: I am going to birmingham new street on Tuesday. Sentence14: Thanks so much. I also wanted to know if you can give me some information on an attraction called Primavera. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User