Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: The train ID is TR4018 and the cost of the journey will be 14.08 pounds. Sentence2: Certainly, where is your destination? Sentence3: My destination is norwich. Sentence4: I have one leaving Cambridge at 17:36 and arriving in Norwich at 18:55. Would you like to book it? Sentence5: I am looking for a train from cambridge Sentence6: I need to leave Saturday after 17:00. Sentence7: There are 133 trains do you have a day and time you'd like to travel? Sentence8: What is the train id and price? Sentence9: You're welcome. Have a great day! Sentence10: That's everything I needed to know thanks. Question: Who has spoken the sentence 6? (A) User (B) System
A:
Answer: (A) User