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 looking to book a train to cambridge on saturday around 20:00 Sentence2: I'm not ready to book quite yet. Can you just give me the travel time, as well as arrival time of that train? Sentence3: Yes it leaves at 20:40 and arrives at 21:08. Sentence4: The train should go to stansted airport and depart from cambridge Sentence5: TR1120 leaves kings lynn at 20:11. Would that work? Sentence6: Ok, I could book the TR3128 which leaves at 20:40. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System