Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Problem:Sentence1: My earliest train is leaving at 5:39 am and arriving at 7:07 am. Is that acceptable? Sentence2: I need a train that leaves on Sunday from London Liverpool Street. Sentence3: Happy to help. Please let us know if you need anything in the future. Sentence4: That should work! thank you, goodbye. Question: Who has spoken the sentence 1? (A) User (B) System
Solution:
Answer: (B) System