Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: well I have a few for you when is your stay? Sentence2: Actually, I don't need a booking yet. You've told me that Prezzo is in the east. All I need is the postcode. Sentence3: I hev five options, on which location do you prefer? Sentence4: You're welcome, have a great day! Sentence5: There are several, is there a particular area you are interested in? Sentence6: I'm sorry, prezzo is actually located in the west. The postcode is cb30ad. Sentence7: Ok great thank you. That is all the information I need today. Sentence8: I also need to find a moderately priced Italian restaurant. Sentence9: i will act on your suggestion. Sentence10: Booking was successful.Reference number is : B6H2PD8G . Sentence11: Hotel you want to book it for 7 people and 5 nights starting thursday and need a confirmation number thank you Sentence12: Is there any moderately priced hotel that offers free parking by any chance? Sentence13: Can you reserve a table? Sentence14: Yes, I can sure book that for you. What evening would you like in particular? How many will be dining? Sentence15: I'm not really picky on an area as long as it is a nice area and the hotel has a 3 star rating. Sentence16: Prezzo is an italian restaurant on the east part of town in the moderate price range. Question: Who has spoken the sentence 15? (A) User (B) System
Output:
Answer: (B) System