Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: We have 2 other choices - both of which are moderately priced guesthouses in the South. The guesthouses are bridge guest house and aylesbray lodge guest house. Do you have a preference? Sentence2: You're welcome. Have a great trip! Sentence3: I'd be happy to. Do you have a specific date and time for your departure? Sentence4: Yes, I'll also need a place to stay in the south and would prefer a guesthouse. Sentence5: Yes, can you try 2 nights please? Sentence6: Can you book one for 4 people for 4 nights starting Tuesday please. Sentence7: No specific price range, but I do need free parking. Sentence8: Unfortunately, none are available for that stay. Would you like me to check availability for a shorter stay? Sentence9: I would like to try for 2 nights since there is no space and I want it for 4 people please. Sentence10: I want to leave on Saturday and should arrive by 18:00, I have a doctors appointment to see to. Sentence11: Yes, they all offer free parking. Sentence12: I need a train that departs from cambridge and arrives at london liverpool street. Can you help me? Sentence13: Let's try a different guesthouse in the south, then. Sentence14: Rosa's Bed and Breakfast is a great one in that area and cheap. It includes free parking and wifi. Would you like me to book you a room? Sentence15: Yes what is the price, departure time, and travel time? Sentence16: Yes, please. I would like to book for two nights and two people starting Saturday. Sentence17: You are welcome, enjoy your trip. Sentence18: Unfortunately there is no space for your request. Would you like to check another hotel or change the length of stay? Sentence19: Thank you for using our services. Is there anything else I can help you with today? Sentence20: Do either of them offer free parking? Sentence21: It is 13.28 pounds, will arrive 15:27, and the travel time will be 88 minutes. Can I help you with anything else? Sentence22: Thank you, that is everything i need. Sentence23: Im sorry i was unable to book that. Is there another hotel you would like to try? Sentence24: Are you trying to shorten your stay? And, may I confirm the stay is for 2 people? Sentence25: The TR4466 arrives in London Liverpool Street at 15:27, would that be acceptable? Sentence26: Nope that is thanks Sentence27: I was able to book aylesbray lodge guest house for 2 days with 4 people. Reference number is AULI4NVQQ . Sentence28: Glad to be of service! So long. Sentence29: ok I have a few options. Is there a price range you would like to stay at? Sentence30: How about for just two nights 4 people at Rosa's Bed and Breakfast? Question: Who has spoken the sentence 28? (A) User (B) System
Output:
Answer: (A) User