You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Thank you, let me know if you need anything else, bye. Sentence2: I have made a reservation at Efes Restaurant for 6 people on Sunday at 17:00. The reference number is 8NR6PAIM . Is there anything else I can help you with? Sentence3: I actually do not have knowledge of any moderate Australian restaurants in the centre. There are some British restaurants I could inform you about. Sentence4: Of course! There are 21 such restaurants available. Do you have a preference for the type of food? Sentence5: Yes, Australian, please. Sentence6: Can you find me a restaurant that is located in the centre and is in the moderate price range? Sentence7: No, that is all, thank you good by. Sentence8: Yes,I need to book a table for 6 people at 17:00 on Sunday, please. Sentence9: There are 2 Turkish restaurants, the Anatolia and Efes Restaurant. Would you like me to make a reservation at one of them for you? Sentence10: Actually, could you look up some turkish restaurants instead? Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System