You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Let me give you an example: 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
The answer to this example can be: Answer: (A) User
Here is 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

OK. solve this:
Sentence1: Their postcode is cb23ar. Sentence2: I am trying to locate information about four star hotels in Cambridge. Sentence3: Yes, there is one named Ayles Bray Lodge Guest House. Does that sound good? Sentence4: Thank you. That will be all for now. Good bye. Sentence5: Do you need me to look up any more info? Sentence6: Thank you for using our services. Have a great stay. Sentence7: What's their postcode? Sentence8: That's it. Thank you. Sentence9: I'm sorry, there are no moderately priced hotels in the south part of town that have 4 stars. I do have a guesthouse that matches those parameters, would that do? Sentence10: Can you book it for me and get a reference number ? Sentence11: The phone number is 01223356060. Sentence12: how about with 4 stars then? Sentence13: I have already done that. The information is above. Sentence14: They do have a room available. Sentence15: Can you book it please? Sentence16: the varsity restaurant is a lovely place, shall I reserve a table there for you? Sentence17: I need one in the south of town. Sentence18: There is a huntingdon marriott hotel here, kingfisher way, hinchinbrook business park, huntingdon. Would you like to book? Sentence19: Yes. I need to book it for 2 people starting Monday. And we will be staying for 5 nights. Do they have room to fit us in? Sentence20: No, I just need one that is in the moderate price range. Sentence21: Booking was successful. Reference number is : ZB5OQSQ5 . what else can i help you with today? Sentence22: Okay, I'm looking for a restaurant that serves international food and needs to be in the same price range as the hotel. Sentence23: I'm sorry, I don't have anything in the moderate price range, would you like to search for something else? Sentence24: No thank you, I would just like to get the postcode and phone number, please. Question: Who has spoken the sentence 9? (A) User (B) System
Answer:
Answer: (B) System