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: Friday for 2 people. We'll be staying for just 2 nights Sentence2: Ok. Thanks for your help. Goodbye. Sentence3: Okay, no problem! Their postcode is CB58PA. Would you like help with anything else? Sentence4: friday and can I get the reference number too please? Sentence5: Sure, what day and how many people? Sentence6: Please find me a good Chinese restaurant on the East side Sentence7: I would like to stay in the east. I do not have a price range. Sentence8: Ok, I have booked you a taxi, It is a yellow toyota and you may reach them at 07319585629. Is there anything else? Sentence9: Sure, the reference number is D0OZC26N . Is there anything else I can help you with today? Sentence10: Yes, I want to find a hotel with free wifi. Sentence11: thanks for inquiring with us Sentence12: Yes, I'll also need a taxi that will commute between the two places. I'd like to leave the hotel at 08:45. Sentence13: I show one chinese restaurant in the east, Yu Garden. Shall I make reservations for you? Sentence14: That is everything that I need. Sentence15: No at this time I would just like their postcode. Sentence16: When will you be arriving? Sentence17: Do you have an area you'd like to stay in? And what is your price range? Sentence18: Booking was successful. Reference number is : D0OZC26N . Is there anything else I can help with? Sentence19: Could you fax me the reference number, as well as any fees for additional amenities? Sentence20: The carolina bed and breakfast is a moderately prices hotel rated 4 stars. Sentence21: welcome anytime you need help Sentence22: Can you book a room for me? Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System