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: I can take care of that for you. Would you like to be picked up at the college? And at what time? Sentence2: The number is 01223210353. I can make that booking for you, I would just need to know and arrival date and for how many people and length of your stay. Sentence3: There is a cheap guesthouse named Allenbell on 517a coldham lane if you are interested. Sentence4: I also need a place to stay. I am thinking a guesthouse in the east part of town. Sentence5: Thanks. I also want to book a taxi to commute between the college and the hotel. Sentence6: I want to leave the hotel at 15:15 to go to the college. Sentence7: Can you confirm if this hotel is 4 star? If so, I will need to book it for 1 person for five nights starting on wednesday. Sentence8: And just to clarify, what sort of attraction is it? I assume it's a college but sometimes things are named oddly, you understand. Sentence9: I was able to book that, your reference is 4B5YCEFU . Sentence10: Yes, downing college is a college. Can I do anything else for you today? Sentence11: Can you try for 2 nights instead? Sentence12: No, I think that takes care of it. Thank you. Sentence13: Sure, it is located in the centre area, on Regent Street, postcode cb21dq, their phone number is 01223334860. Sentence14: It is four stars but unfortunately I cannot book it. Would you like to change the date? Sentence15: Thank You, have a good stay. Goodbye. Sentence16: I have confirmed your taxi, a black bmw will be picking you up. Their contact number is 07830542895. Can I help with anything else? Sentence17: That sounds great. Can I have the number? Sentence18: I am looking for Downing College. Can you give me information on it? Question: Who has spoken the sentence 10? (A) User (B) System
Output:
Answer: (A) User