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: Unfortunately, I am not able to find any Australian cuisine in Cambridge? Can I look up another type of restaurant for you? Sentence2: Yes, please book it for me. Sentence3: Would you like to go to milton country park? They are located in the north and the entrance fee is free. Sentence4: Let's make it for six people at 15:00 on saturday. Sentence5: Hmm, I'll try asian oriental instead. Sentence6: What day and time should I make the reservation for? How many people? Sentence7: No, I apologize there are no Australian restaurants in Cambridge. Would you like to try another type of cuisine? Sentence8: Booking was successful. The reference number is 30D245LZ . Anything else I can do? Sentence9: you are very welcome. thank you for using our system. Sentence10: Sure. What is their postcode and phone number? Sentence11: The postcode is cb46az. The phone number is 01223420060. Can I help you with anything else? Sentence12: That all thank you very much for all your help. Sentence13: Thank you! Now I need some suggestions on places to go in that same area of town. Sentence14: saigon city is one of the best places in town. Shall I book it for you ? Sentence15: Are you sure there are no restaurants that serve Australian food in the north that has an expensive price range? Sentence16: i need to eat australian food in a place that is expensive Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System