Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: There are 9 restaurants that fit that description. Are you looking for a cheap or expensive restaurant? Sentence2: No thank you. Sentence3: That sounds fine. Can you book for 4 people at 19:30 on sunday? Sentence4: I'd recoment the Mahal of Cambridge. It's inexpensive, and conveniently located. Would you like me to book you? Sentence5: I want to find a place to eat that serves indian food in the centre of town. Sentence6: Ok lets try there. Sentence7: Booking was unsuccessful. Would you like me to look at another location? Sentence8: Your all set. Reference number is HKBDRN69 . Anything else? Sentence9: Price range doesn't matter. Which restaurant out of the 9 do you recommend? Sentence10: How about the ghandi? Sentence11: Yes. Can you find me something that is available in the same area and price range? Sentence12: Okay. Thanks so much for calling. Enjoy your evening! Question: Who has spoken the sentence 1? (A) User (B) System
A:
Answer: (B) System