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

Sentence1: Byard Art is a museum in the south. It is free and located at 14 King's Parace. Phone #01223464646. Sentence2: carolina bed and breakfast is a great pic. It is a 4 star guesthouse in the east part of town in the moderate price range with both free internet and parking Sentence3: Thank you for using our service today! Sentence4: Done! Your reference number is LFN02VLJ . Can I help you with anything else? Sentence5: There is carolina bed and breakfast that is 4 stars and moderately priced. It has free parking and internet. Would you like me to book this for you? Sentence6: You're welcome, let me know if I can assist with anything else. Sentence7: Would you like me to book it for you? Sentence8: That sounds lovely. Could you book it for me please? The 4 of us are coming in on Sunday for 4 nights. Sentence9: Hello, I am looking for a museum attraction in the south part of town. Sentence10: I will book that for you now. Sentence11: No that will be it. Thank you. Sentence12: What area would you like to stay in? Sentence13: Yes I will need a taxi between the hotel and venue and I need to leave the hotel by 22:45. Sentence14: Sorry, I think I garbled that- it's at 14 King's... what's the address again? Sentence15: No thanks. That's all the help I need today. Sentence16: I'd like to stay in the east. Sentence17: Ok, thank you. Also, I need a place to stay in the moderate price range. Free parking is not necessary. Sentence18: Actually, could you find a hotel for me? I would like it to be in the moderate price range. Sentence19: I am not sure what you asked the address is in the chat history. Thanks Sentence20: Yes, please. Leaving the hotel by 22:45. Sentence21: The car picking you up will be a black tesla and their contact number is 07911492515. Is there anything else I can assist you with? Sentence22: Thank you, please do! Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System