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, there are multiple places to stay in Cambridge. May I help narrow down these choices for you? Sentence2: I need a place to stay with free wifi. Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : UF08L0ON . Anything else that I may help you with. Sentence4: I'd suggest bridge guest house on 151 hills road. Would you like a reservation? Sentence5: Can you make a reservation for 8 people for 5 nights starting from Wednesday? Sentence6: Actually, I'm also looking for an expensive place to dine in the centre. Sentence7: I don't care about what part of town it is in, but I would like a 3 star guesthouse. Sentence8: Thank you for using our services. Sentence9: The Bridge Guest House is in the moderate price range, and we have attractions in all areas of Cambridge so I'm sure you will find something to your liking. Sentence10: No, you've been very helpful. That's all I needed. Thank you very much. Sentence11: Yeah, I'd like a taxi to take me from my hotel to the restaurant in time for my reservation. Please tell me the car type and contact number. Sentence12: yes, that's everything for me. Thanks for helping, goodbye Sentence13: The Kymmoy is expensive and in the centre of town Sentence14: Taxi is booked. It's a black volkswagen, phone number 07609143114. Is that all for now? Sentence15: How expensive is it ? And is there any nearby attractions ? Sentence16: I was able to book the room for you your reference number is 5YY25K1O . Is there anything else you need me to do for you? Sentence17: I need to book a table for the same group of people at 20:00 the same day. I need the reference number as well. Sentence18: You are welcome. Question: Who has spoken the sentence 13? (A) User (B) System
Solution:
Answer: (B) System