Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Yes I would like the reference number and that will be all today. Sentence2: I don't need free parking. I do care about moderate price range in the north with 4 stars. Sentence3: Yes, please. I need to book it for 3 people for 3 nights starting Saturday. Sentence4: Is there anything else I can help with today? Sentence5: christ's college is found in the center their address is saint andrew's street and their poscode is cb23bu. You can reach them on the number 01223334900 Sentence6: Okay! What type of place would you like to visit? Sentence7: Booking was successful. Reference number is : 6GVW9A45 . Sentence8: Your booking was successful. Would you like the reference number? Sentence9: Yes, please recommend a guesthouse based on recent reviews. Sentence10: Thank you very much. Sentence11: There are no hotels but there are 7 guesthouses in the north meeting your requirements. Do you want me to choose a guesthouse for you? Sentence12: Do you need help with anything else? Sentence13: There is not one listed, do you want to try a 3 star hotel ? Sentence14: Yeah, I need to book a 4-star hotel in the north that's mid priced. Sentence15: Have a wonderful night. Sentence16: Okay, I recommend avalon. Do you want me to book? Sentence17: i'm looking for places to go in town. Sentence18: No thank you, I am all taken care of now. Thanks, and goodbye! Sentence19: Thank you for your time. Sentence20: College's seem nice, can you suggest one and give me the address, postcode and phone number if its not too much trouble Question: Who has spoken the sentence 7? (A) User (B) System
Output:
Answer: (B) System