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, I've got the Bloomsbury Restaurant at 13:30 for 6 on Wednesday. Sentence2: No, I don't need to book a room, but can I get their contact info and location please. Thanks. Sentence3: Yes, please book for 6 people at 1330 on Wednesday. Can I also have the reference number as well? Sentence4: Yes, I would like to book a table for 6 people at 13:30 on Wednesday. Sentence5: Sure is that in the moderate price range? Sentence6: That will be all today. Thank you very much. Sentence7: Yes it is! Would you like to book there? Sentence8: Do they have internet? Sentence9: I'm sorry but there are only two international restaurants, is there another type of food you would like? Sentence10: Cityroomz is a hotel in the city center with 0 stars. It's moderately priced. Do you want me to book that for you? Sentence11: Certainly. Cityroomz is in the centre of town, and their address is Sleeperz Hotel, Station Road, postcode cb12tz. Their phone number is 01223304050. Can I help with anything else? Sentence12: I managed to book your table and your reference number is 5ISFHKR3 . Can I help you with anything else today? Sentence13: What about the other restaurant that serves international cuisine? Sentence14: Unfortunately, that booking was unsuccessful. Would you like to try another time? Sentence15: Great can you please book that for me, and give me the reference number Sentence16: Bloomsbury restaurant meets your criteria. Would you like me to book you a reservation? Sentence17: Yes, Cityroomz has internet. Is there anything else I can help you with today? Sentence18: I'm sorry but I was unable to book you for that time. Would you like to try another day or another time slot? Sentence19: I'm sorry, but I was unable to book either restaurant for 1330 on Tuesday either. Would you consider dining a little earlier or later? Sentence20: Yes - are there any restaurants serving international cuisine that are located in the center of town? Sentence21: If neither restaurant is available for 13:30, can you try 14:30? It's later than I wished, but I guess that can't be helped. Sentence22: Can you find me a restaurant in the centre of town that has availability for Wednesday at 13:30? Sentence23: I'm sorry booking for both restaurants at 1430 were unsuccessful would you like to try another time? Sentence24: Your welcome, have a nice day. Sentence25: No how about trying another restaurant for the same time. Sentence26: Could you try it for Tuesday? Sentence27: Absolutely! There are two in the area - may I suggest The Varsity Restaurant? Sentence28: Hello, I'm looking for a place to stay the night. I'd like a hotel, but nothing fancy, it can have zero stars and that's fine. Do you have any recommendations? Question: Who has spoken the sentence 12? (A) User (B) System
Solution:
Answer: (A) User