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: Booking was successful. Reference number is : 40GGN5EY . Is there anything else I can assist you with? Sentence2: sure, its moderate, phone is 01223500005 and the postcode is cb11ln, anything else? Sentence3: On wednesday please Sentence4: can you book me at Ashley Hotel for 1 and 3 nights ? Sentence5: Thank you, that'll be all today. Sentence6: There are two hotels that match what you're looking for. The Ashley Hotel and Lovell Lodge. Does either of those sound preferable? Sentence7: Yes, I'm also looking for some information on a restaurant called Efes. I'll need the phone number, price range, and postcode, please? Sentence8: I am looking for a moderately priced hotel in Cambridge. Sentence9: I have three choices for you. Do you have an area that is more convenient for you? Sentence10: No problem! What day are you wanting to check in? Sentence11: Yes, can you check the north please? Sentence12: If the hotel and restaurant are all you need for today, then thank you for contacting Cambridge TownInfo centre. Goodbye. Sentence13: Yes that's what I already asked you to do. Sentence14: Would you like me to book it for you? Question: Who has spoken the sentence 9? (A) User (B) System
Solution:
Answer: (B) System