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: Could you please make a reservation on Sunday for 7 people at 21:00? I would like a reference number. Sentence2: Your booking is complete. Your table is reserved for 15 minutes and your reference number is NCQJQGNE . Is there anything else I can help with? Sentence3: Unfortunately, the restaurant is already booked at that time. Is there another day or time you would like to go? Sentence4: There is a train at 15:39 and several others every two hours after that. Can I book a seat for you? Sentence5: I'm leaving from London Liverpool Street after 14:45. Sentence6: Booking was successful, the total fee is 13.28 GBP payable at the station . Your Reference number is 33Z0FMIQ . Sentence7: I think that is it. Thanks so much for your help Sentence8: Great. Can you also help me find out about a restaurant called charlie chan? Sentence9: I have 202 trains traveling to cambridge on Sunday. Where will you be departing from, and what time would you like to arrive? Sentence10: No, just one ticket please. Sentence11: Okay thank you for calling. Sentence12: Hi, I need a train to Cambridge on Sunday. Sentence13: please book me on the 15:39 train. Sentence14: How about 20:00? Sentence15: Will you needing more than one ticket? The cost per seat is 13.28 pounds. Sentence16: Charlie Chan's address is Regent Street City Centre and the number is 01223361763. Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System