You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: no thanks, that is okey for today Sentence2: Okay! Would you like for me to book you a room? Sentence3: Yes please. I'll need it for 3 nights starting Sunday for 5 people. Sentence4: There are two hotels in the north that fit your needs: the ashley hotel and the lovell lodge. Do you have a preference? Sentence5: there is none in that area. do you mind changing the area? Sentence6: Booking completed! Booked car type : white volkswagen Contact number : 07255014387 Can i help you with anything else today? Sentence7: Could you please give me Club Salsa's address and postcode? Sentence8: Okay, well if you need anything else you know where to find me! Have a good one! Bye! Sentence9: Thanks I also need a taxi to leave Club Salsa. Sentence10: I would want to return by 2:45. Sentence11: Okay, how about a nightclub? Sentence12: We have many options. Would you like to narrow it down by area or stars? Sentence13: I would like it to be 2 stars, and a hotel. Sentence14: I'm sorry there are no entertainment attractions in the centre. Is there another area or attraction type you would be interested in? Sentence15: I was really hoping to find one in that area. Sentence16: I am also looking for someplace in the moderate price range, a room with free wifi. Sentence17: Sure, Club Salsa is located at 1 Station Road, cb12jb. Would you like any additional information? Sentence18: I'm sorry, I was mistaken. I have 5 options for nightclubs in the centre. I like club salsa, personally. Sentence19: OK, 3 nights starting Sunday for 5 guests. Your Reference number is : DUYCGOB2 . Sentence20: Sure, will you be going back to Lovell Lodge, and at what time? Sentence21: i want you to recommend a place to go in the centre that is type of entertainment Sentence22: Let's try the Lovell Lodge. Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System