You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I need to get to Pizza Express for my 18:30 reservation, please. Sentence2: Great. Can I get the phone number for the cinema? Sentence3: Where will you need the taxi to pick you up? Sentence4: italian food, please Sentence5: I need to be picked up at Vue Cinema. Sentence6: We have 9 choices in the centre, any preference on price range? Sentence7: You have been most helpful setting this up. Thank you. Goodbye. Sentence8: We have quite a few Italian restaurants all over town. Is there a particular part of town you want to stick to? Sentence9: i also need a taxi. Sentence10: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 7LYLSH0V Sentence11: Yes, please book it for thursday at 18:30 for 4 people. I'll need the reference number as well please. Sentence12: What type of food would you like? Sentence13: Thank you for using our service today! Sentence14: Okay, you're all set with a taxi. It's going to be a black toyota and the contact number is 07976731692 Sentence15: Thanks. I also need to find a place to dine, please. Sentence16: And where will your destination be? Sentence17: pizza express would fit your needs, would you like to make a booking? Sentence18: The phone number for Vue Cinema is 08712240240 and they are in The Grafton Centre on East Road. Can I help you with anything else? Sentence19: Yes, I'd like one that was in the centra as well. Sentence20: Can you help me find a cinema in the centre? Sentence21: sure, there's a cineman called vue cinema Sentence22: Yes please; I'd greatly prefer the moderate price range as I'm on a bit of a budget. Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System