Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Great. Can you get me a phone number and postcode? Sentence2: The Bridge Guest House is in the south and has free wifi. It is a moderately-priced with a 3-star rating. Would you like to book a room? Sentence3: No, thank you. Have a good day. Sentence4: I have booked the Royal Standard for 3 people on Friday at 16:00. Sentence5: Thank you, enjoy your stay. Sentence6: Please book a table for 3 people at 16:00 on Friday. Sentence7: Thank you. I also need a place to stay in the south. It doesn't need to have free parking, but I do need free wifi. Sentence8: Royal Standard is in the East. Sentence9: Done! Your reference number is JV5NNEDF . Can I help you with anything else? Sentence10: No. What area is royal standard in? Sentence11: The phone number for the Royal Standard restaurant is 01223247877 and postcode is CB13NL. Would you like me to book a table for you? Sentence12: I would like some information of the restaurant called Royal Standard. Sentence13: Royal Standard is a gastropub in the East, it is in the expensive price range. Would you like a reservation? Sentence14: yes, please for 7 people for 4 nights starting on tuesday. Sentence15: no, just needs to be in the south Sentence16: Is there a price range for the hotel? Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System