You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I'd be happy to help - where should the taxi pick you up? And just to confirm - you need to leave at 18:15? Sentence2: Booking completed! Booked car type : blue volvo Contact number : 07423194148 Sentence3: You are welcome. Thanks for calling. Goodbye. Sentence4: Yes, leave by 18:15 and from La Margherita. Sentence5: I need to book a taxi to take me to The Junction. I need it here by 18:15. Sentence6: Okay, thanks a lot. You have a great day. Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System