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: Alright, you're all set. A grey skoda will pick you up. The contact number is 07629344637. Can I help you with anything else? Sentence2: I'm leaving from mahal of cambridge. Sentence3: Thank you so much! Sentence4: I would like to book a taxi to arrive by 13:45 to go to carolina bed and breakfast. Sentence5: I can help you with that, but can you please let me know where you will be leaving from? Sentence6: You're welcome. Goodbye. Sentence7: No, that's all. thank you! Sentence8: We are happy to help, thank you for using our services! Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System