You will be given a definition of a task first, then some input 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: Sounds nice, I will book for 2 people at 14:30 on Wednesday. Sentence2: Oh wait. I really want to find a museum. Sentence3: Your reservation number is ZK239M8H . Is there anything else I can help you with? Sentence4: Sure thing! Which area and price range? Sentence5: No, thanks! But will you please find me an expensive restaurant in the Centre part of town? Sentence6: an expensive British restaurant, what would be one you would recommend? Sentence7: What do you suggest? I don't know the town, so I don't have any idea where to go. Sentence8: I have about 23 museums to choose from. Is there a certain area of town I can focus on? Sentence9: Yes i need to book at hotel. Sentence10: I would recommend the Broughton House Gallery, it is in the centre and the entrance fee is free. Would you like the address or phone number? Sentence11: No thank you. Sentence12: Have a good time. Sentence13: There are many expensive restaurants in Centre. Is there a certain type of cuisine that you prefer? Sentence14: oh may I suggest midsummer house, it's great and I go there all of the time Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System