Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: i want to book a taxi. The taxi should go to da vinci pizzeria and should depart from the missing sock. Sentence2: By 02:00 please. Sentence3: You're welcome and thanks for using our help desk. Goodbye Sentence4: Perfect. That'll be all. Thank you so much for your help. Have a good day. Sentence5: Booking completed! Booked car type : black toyota Contact number : 07381507010 Sentence6: Do you know what time you would like to arrive? Question: Who has spoken the sentence 1? (A) User (B) System
A:
Answer: (B) System