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: No, thank you. I am not ready to reserve quite yet. Could you just tell me the postcode for The Alexander Bed and Breakfast? Sentence2: No, that should do it, thanks! Sentence3: Is it also in the cheap price range? Does it include free wifi? Sentence4: We're happy to be of service. Enjoy your stay in Cambridge! Sentence5: Yes, thank you. Sentence6: I have 9 entries meeting all 3 requirements, are you looking for a certain part of the city? Sentence7: I want to go to Kings Lynn on Wednesday. Sentence8: Sure. The Alexander bed and breakfast is in the centre, and their phone number is 01223525725. Should I book you a room? Sentence9: Actually I would just like the postcode and telephone number. Sentence10: Ok great I will book you a room for 4 people. How many nights would you like? Sentence11: Yes that sounds perfect, I will need 3 tickets and a reference number please. Sentence12: I have train TR2182 departing Wednesday at 22:11 and arriving in Kings Lynn at 22:58. Would that work for you? Sentence13: I was able to book you 3 tickets for that train. Your reference number is NYP3RNM4 . Is there anything else I can help you with? Sentence14: Hi. I need a train leaving from Cambridge anytime after 21:30. Sentence15: No - could you please choose one for me? I don't like to stress out too much about travel arrangements. Sentence16: I will need some more information to book a room, what day will you arrive, for how many people and how many nights? Sentence17: I am also looking for a place to stay, preferably a guesthouse that includes free parking. Sentence18: I will be arriving Wednesday. We will need a room for 4 people. Sentence19: Where do you want to go? Sentence20: The postcode is cb12de. Is there anything else I can help you with? Sentence21: You will have to contact the hotel directly to do that, do you still want to book the room? Sentence22: Sure. The postcode is cb12de and the phone number is 01223525725. Is there anything else I can help you with today? Sentence23: Ok. I am trying to book the hotel for 4 people for 1 night. You wanted the hotel for Wednesday night, right? Sentence24: Let's just do one night for now. Can I cancel the reservation if I decide I don't need it? Sentence25: I would like to book the room and get the reference number please. Sentence26: There are 21 guesthouses that offer free parking, did you have any other requirements? Question: Who has spoken the sentence 13? (A) User (B) System
Solution:
Answer: (B) System