Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I would be happy to book that for you, what time would you like to arrive? Sentence2: Have a great night! Goodbye! Sentence3: You've been booked. Expect a blue Volkswagen to get you to kambar by 3:30. Their contact number is 07466224734. Can I help with anything else? Sentence4: I want a taxi to come to The Junction to take me to Kambar. Sentence5: You are most welcome! Sentence6: Thank you for contacting us and have a nice day. Sentence7: No, that's everything. Thanks! Sentence8: At 3:30 pm Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System