Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I'm so sorry but we don't have any expensive cantonese. Would you like to try another type of food? Sentence2: All set. Your reservation for one is confirmed for Wednesday at 19:30. Your reference is HB2TWWH0 . Is there anything else I can do for you today? Sentence3: enjoy your stay! Sentence4: I got you booked for the Acorn Guest House for 1 person for 2 nights starting on Wednesday. Your booking number is 2NFSNMZP . Is there anything else I may assist you with? Sentence5: The guesthouse has free wifi and parking Sentence6: I booked the Acorn Guest House in the north, the address: 154 Chesterton road. How many days are you going to stay? Sentence7: I would suggest Fitzbillies Restaurant. Would you like me to book a table now? Sentence8: That would be perfect. Sentence9: Can I just confirm it has free internet as well Sentence10: What does Cambridge offer as far as expensive cantonese restaurants? Sentence11: No, but I want the most expensive one. Sentence12: There are 6 British restaurants. Do you have a particular area of interest? Sentence13: I'll be dining alone so please make a reservation for 1 at 19:30 or 18:30, perfer 19:30 on wednesday. Reference number please? Sentence14: How about british food instead. Sentence15: how about acorn guest house? i hear it's lovely Sentence16: I will be staying 2 days. Sentence17: I'm also looking for a hotel with free parking. It will be for just one person, like the restaurant booking. Sentence18: Great, that will be all thank you. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System