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: I'm looking for a 4 star hotel in the east. Sentence2: Ok, can you pick one for me? I'll just need the address and postcode please. Sentence3: thanks so much you've been really patient and kind. Sentence4: No, you have helped me fully. Thank you very much. Sentence5: Great, can you book a table for 4 people on Thursday at 19:45? Sentence6: Home from Home is a great 4 star guesthouse located at 78-80 milton road, cb41la. Is there anything else I can assist you with? Sentence7: I was able to book your table for 18:45. Your reference number is X15KR3V6 . Sentence8: Can you try again for me? Sentence9: The Missing Sock is near your hotel and has cheap International Food. Sentence10: Glad I could help is there anything else you need today? Sentence11: Is there any preference for wifi or parking access? Sentence12: great, that narrows it down to seven options! Sentence13: Yes, I need to find a restaurant that serves international food and is cheap. Also I need it in the same area as my hotel. Sentence14: Call us again anytime. Good Bye. Sentence15: No, is there anything available for 18:45? Sentence16: I need free parking. Sentence17: I do not have a date at this time. Sentence18: Unfortunately, our booking system is down at this time. Sentence19: I have some excellent guesthouse choices, may I check availability for a certain date? Sentence20: There is no availability at that time in the establishment. Would you like to try a different place? Question: Who has spoken the sentence 7? (A) User (B) System
Solution:
Answer: (B) System