You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I am looking for a place to eat in the centre of town. Sentence2: You have many different options to choose from as well as different price ranges. Are you looking for a casual or formal restaurant? Sentence3: I would like it moderate priced and make sure it is a guest house please. Sentence4: Your booking was successful. Reference number is : F20O5QD5 . Is there anything else I can help you with? Sentence5: Can i get the post code as well please? Sentence6: it's for 5 nights for 7 people on friday. Sentence7: It doesn't matter, as long as it is a guesthouse and includes free parking. Sentence8: We have quite a few, may I suggest the acorn guest house? I need to know when you'll be arriving and the number of people please. Sentence9: Do you wish to stay in the centre of town? Sentence10: Can you also find me a place to stay that includes free wifi and in the same price range as the restaurant? Sentence11: The address is 52 Mill Road City Centre. Their phone number is 01223311911. Sentence12: The postcode is cb12as. I can make a reservation for you if you'd like. Sentence13: I need reservations for 7 people at 17:30 on friday. Sentence14: Reference number is : MWDLZXJR . Is there anything else? Sentence15: I'm sorry but there are no guesthouses that match your criteria. Would you like me to look for a hotel instead? Sentence16: check out kymmoy. its asian oriental and its expensive. you want the adress? Sentence17: You have a wonderful day as well. Good bye. Sentence18: I don't really care, not really picky. Sentence19: Thanks, that about does it for me today. Have a good one, bye! Sentence20: are you sure there are no moderately priced guesthouses with parking and wifi in all of cambridge? That seems unlikely to me Sentence21: yes adress and phone number please Sentence22: There are several, do you have a specific area you are interested in? Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User