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: No, that's all I need. Thanks. Sentence2: sure it is 01223902091 Sentence3: I'm sorry but you will have to go there in person to see the fee, but the address is cambridge passenger cruisers, jubilee house. Sentence4: I have many attractions in that area. What type of attraction are you interested in? Sentence5: We have two guesthouses, one in the north and one in the east both are priced moderately, can I help with any other questions? Sentence6: I would like something near the Avalon guesthouse. Sentence7: I prefer the north. Sentence8: No problem, enjoy the rest of your day. Sentence9: Thank you for calling. Goodbye. Sentence10: I'm sorry, I just remembered I'm looking for an attraction as well. Can you help? Sentence11: Ok, that would be Avalon guesthouse. Do you want to book a room there? Sentence12: Yes please! Could I get their entrance fee and address? Sentence13: Yes, please. 3 people for 5 nights starting on Sunday Sentence14: How about a boating attraction. The Riverboat Georgina would be nice. Would you like additional information? Sentence15: I need some help finding a place to stay with a 4 star rating and free wifi. Sentence16: Could I have the phone number as well? Sentence17: Booking was successful. Reference number is : 9ZVM9EPE . anything else today? Sentence18: It does not matter can you recommend one please? Sentence19: Thank you very much. That is all I needed. Sentence20: sure, what would you like to know? Question: Who has spoken the sentence 7? (A) User (B) System
Output:
Answer: (B) System