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: Great thank you, I am also looking for an expensive Indian place to eat Sentence2: Sorry, I don't have that information. You can call them to find out. 01223332138 and 01223312112 are the phone numbers. Sentence3: That's great. What time does each attraction open? Sentence4: I'm sorry, but you'll have to book at another time slot. What other time slot would you like to book at? Sentence5: I will need to arrive at Tandoori Palace by 12:30 please. Sentence6: No problem. Your table is booked at 12:30 on Wednesday. Sentence7: Hi, I am interested in finding attractions on the west side of town. Sentence8: I would prefer to eat in the same area as Cafe Jello Gallery. Sentence9: I have confirmed your booking a white audi will be picking you up. Their contact number is 07621830686. Do you need help with anything else? . Sentence10: Cafe Jello Gallery is a museum. There are 22 Indian restaurants in Cambridge, do you have a preferred price range or area? Sentence11: Your reference number is SRC2I813, your table will be held for 15 mins. Is there anything else I can assist you with? Sentence12: Could you please tell me what time you want to leave or what time you want to arrive so I can book the taxi for you? Sentence13: Sounds great! Could I book a reservation for 6 people at 13:30 on wednesday? Sentence14: Yes. I need a taxi to take me from the museum to the restaurant. Sentence15: Can you tell me what type of attraction Cafe Jello Gallery is please? I also want to find an indian restaurant. Sentence16: Okay great. Glad i could be of help. Sentence17: I've got 14 expensive Indian restaurants. Is there a particular part of town you'd like to eat in? Sentence18: No, I think that's everything. Thank you so much. Sentence19: Okay, how about the Tandoori Palace? It's in the same area. Sentence20: How about Magdalene College and Cafe Jello Gallery (13 Magdalene St), both free and on Magdalene St? Sentence21: Let's try 12:30 then. Sentence22: What is the reference number for the reservation? Question: Who has spoken the sentence 17? (A) User (B) System
Output:
Answer: (B) System