Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Your booking is all set. A black honda will be picking you up. Sentence2: You're welcome. Have a good time! Sentence3: I am at Club Salsa and I need to book a taxi to leave after 06:15. Sentence4: Sure! What is your destination? Sentence5: I need to go to the Cambridge arts theatre. Sentence6: Wonderful, thanks for your help. Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System