Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: You're all set. Expect a black audi, contact number 07715481740. Is there anything else I can assist you with? Sentence2: I'm heading to finches bed and breakfast. Sentence3: Where will you be going? Sentence4: Have a wonderful time, and good luck! Sentence5: I need to get a taxi from emmanuel college Sentence6: Okay, what time do you want to leave? Sentence7: I don't have a preference but would like to arrive by 22:30. Sentence8: No thank you. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User