Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I am actually leaving on Saturday from cambridge. Sentence2: I'm looking for a train going to london liverpool street. Sentence3: Great, can you please book it for 2 people and give me the reference number? Thanks. Sentence4: The train id is TR2895 and it leaves cambridge on saturday . Sentence5: the train id is TR5154 and it leaves cambridge on friday Sentence6: You are all booked for Saturday. The train departs at 05:59 and arrives at 07:27. The price is 13.28 pounds. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System