You will be given a definition of a task first, then an example. Follow the example to solve a new instance 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 need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Solution: Answer: (A) User
Why? The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input: Sentence1: Yes please do and send me the reference number. Sentence2: Castle Galleries is a lovely museum in the town centre. The address for the attraction is unit su43, grande arcade, Aaint Andrews Street. Sentence3: You are all set with the booking, the reference number is B8R0DO3L, can I help with anything else? Sentence4: My destination will be going from the Castle Galleries and going back to the Alexander bed and breakfast Sentence5: Sure, can you tell me your destination just so I can be sure to send it to the right place? Sentence6: Can you also provide the address to an attraction in the town centre? Sentence7: Have a great time. Sentence8: That is all I need today. Thank you. Sentence9: I need it for 7 people for 3 nights starting on friday please. Sentence10: Alexander bed and breakfast is a guesthouse in town centre with 4 stars in the cheap price range, and has free wifi. Shall I book a room for you? Sentence11: I can surely help with that. Which part of town are you specifically looking for? Sentence12: I don't care which part of town it is. I just want a cheap place with free wifi. Sentence13: I've booked a blue tesla, which you can reach at 07827647450. Anything else for you today? Sentence14: Thank you. I will also need a taxi to pick me up at the attraction by 21:30. Send me the contact number and car type please. Sentence15: What day would you like me book and how many days will you be staying? Sentence16: I need a hotel the next town over. Question: Who has spoken the sentence 9? (A) User (B) System
Solution:
Answer: (B) System