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: What side of town would you like to stay on? Sentence2: You're welcome, have a great day! Sentence3: What is your price range? Sentence4: Ok, I've got you a cab from hobsons house to graffiti, arriving by 17:45. The car is a yellow lexus. Contact number : 07292320210 Sentence5: Do you mean that it is close to the restaurant? Can you give me the phone number? Sentence6: cool, i need a place to stay, too. Sentence7: I would like to find a 3 star guesthouse that has free parking. I would need the area it is in and a phone number. Sentence8: There are no asian oriental places in that area of town. Would you like a different type of food? Sentence9: I can, what type of food are you looking for? Sentence10: thank you for your help. That's all I need today. Sentence11: Sorry, yes, that is what I meant. The phone number is 01223304906. I can book that for you if you'd like. Sentence12: Booking was successful, table will be reserved for 15 mins. Reference number is : I8UTT26J . Sentence13: What about British food in that part of town? Sentence14: I would like a three star place, if you have one. Sentence15: We were thinking we would like some Asian Oriental food, if available. Sentence16: If you'd like to stay near the hotel, the Hobsons House is a guesthouse in the west. It is moderately priced and has free parking. Would you like information on that? Sentence17: Let me try Graffiti out. Can you book it for 2 people on Saturday at 17:45? Sentence18: I don't really care. I do need free wifi, but parking doesn't really matter. Sentence19: I'm looking for somewhere to eat in the west. Can you help me out? Sentence20: In british cuisine, you have three choices. Saint John's Chop House is moderately priced, while Graffiti and Travellers Rest are expensive. Sentence21: No, thank you. I do need to book a taxi from the hotel that arrives at the restaurant by the reservation time, though, please. Sentence22: Your table is booked. Reference number is I8UTT26J . Question: Who has spoken the sentence 18? (A) User (B) System
Output:
Answer: (A) User