Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I have several that match that criteria, do you care about parking or wifi? Sentence2: Are there any in the moderate price range? Sentence3: i need a place to go which is the type of a college. Sentence4: Yes, I need to book accommodation. can you recommend a guesthouse in the northern area of town? Sentence5: Sounds great, Can you book it on Sunday for 2 nights for 2 people? Sentence6: I have booked you with a yellow honda taxi. The number to contact is 07912722753. . Sentence7: I would like it to be expensive please Sentence8: How does the Acorn Guesthouse sound. It is moderately priced and has free wifi. Sentence9: I would also like to book a taxi from the college to the guesthouse. Can you help with that? Sentence10: Sure, can you give me the address for that? You said it is in the west, right? Sentence11: Is there a certain area you're interested in? If that doesn't matter, I recommend Clare College in the west. Sentence12: Great!! Thank you for all your help. Sentence13: I sure can! I'll just need to know a time that you either want to arrive at the hotel by or leave the college by. Sentence14: Your welcome! Please contact us anytime. Good bye. Sentence15: I'd prefer it to have wifi, parking it doesn't really matter. Sentence16: I want to leave the college by 21:15 please. Sentence17: I was able to book the room, the reference number is MQGFE5F1 . Is there anything else I can assist with today? Sentence18: That's right Clare College in the west part of town. The address is just trinity lane. Anything else I can do for you? Sentence19: Is there a price range you prefer? Sentence20: There are no hotels that match that criteria. Are you interested in a different price range. Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User