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: how about a star of 3, then? Sentence2: Oh, sorry. 17:15 on Friday. Sentence3: What about the Ashley hotel? Sentence4: That would be great. Can you get me the postcode for the hotel, please? Sentence5: They are located in the centre of town. Would you like a reservation? Sentence6: Thank you for your call. Have a great trip! Goodbye. Sentence7: They serve British food. Sentence8: I'm happy to help you with that. I just need to know your destination and I can book that for you. Sentence9: I need to be picked up at 17:00 from Ely. Sentence10: I was told about a great place to eat called the copper kettle. Sentence11: Can I please book a taxi from the hotel to the restaurant? Sentence12: What kind of food do they serve? Sentence13: sure thing it is cb41er, anything else today? Sentence14: Where and when do you want to be picked up? Sentence15: no I think that just about covers it, thanks Sentence16: I am sorry but I am not finding anything that matches your request. How about a different ratinge or area? Sentence17: I'm sorry. I'm not finding any results that match your criteria. Would you like to try a different location? Sentence18: Yes, I would like a reservation for 4, please. I would also like a place to stay. Sentence19: Booking was successful. The table will be reserved for 15 minutes. Reference number is : BZIAV28X . Tell me about your hotel requirements. Sentence20: I need the taxi to commute between the hotel and the restaurant. I have my restaurant reservation, but I still need to find a 2-star hotel in the south. Sentence21: it should be a 2 star in the south and should be the type of a hotel. Sentence22: Okay, let's start with the hotel. As I'm looking, I don't see a 2-star hotel in the south. Would another rating suit your needs? Sentence23: Alright, but first, for that reservation, what time and day would you like? Sentence24: OK, I have one hotel located in the south, the lensfield hotel, and it is a 3 star. It's expensive, is that ok? Sentence25: If there isn't a 2 star hotel, a 3 star hotel will do. Sentence26: No I need something cheap really do Sentence27: sure thing a blue bmw will be picking you up and the contact number is 07240838121, anything else today? Sentence28: no. then find me a taxi Question: Who has spoken the sentence 16? (A) User (B) System
Answer:
Answer: (A) User