Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Taxi to de luca cucina and bar please Sentence2: I need to arrive by 15:30, please. Sentence3: Do you want a taxi now ? Sentence4: What time would you like to arrive at your destination? Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System