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: Okay, the post code is cb43ax and the phone number is 01223351880. Sentence2: What times do they have available. Sentence3: It would be easiest if you would pick a time. Sentence4: What are some expensive british restaurants to dine at? Sentence5: Unfortunately, there are no British restaurants in the north that are expensive. Would you like mt o look in another are or try a different cuisine? Sentence6: Sure, when would you like the reservation for? Sentence7: Yeah, I'm looking in the north. Sentence8: sure, there's one there called restaurant two two. Sentence9: Actually, I don't need to book a time right now, I just need the postcode and phone number for the time being. Sentence10: I hope you have a great stay in town. Goodbye. Sentence11: How about expensive French restaurants in the north? Sentence12: Thank you. I am also looking for places to visit in town. I think a college would be nice. Could you recommend one? Sentence13: Sure, are you looking in a certain area? Sentence14: That's all I needed today. Thanks! Sentence15: Can I also have their phone number and address? Sentence16: Sure, Christ's College would be a good choice. It's in the centre of town and does not have an entrance fee. Would you like more information? Sentence17: Of course. The phone number is 01223334900 and the postcode is cb23bu. Can I help you with anything else today? Sentence18: Can you make me a reservation please and send the reference number? Question: Who has spoken the sentence 16? (A) User (B) System
Solution:
Answer: (A) User