You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Thank you for calling. I hope you enjoy your trip. Goodbye. Sentence2: okay your total is 116.2 GBP payable at the station and your confirmation is 40B9LTO9 . Sentence3: I need a place to dine during my trip. It needs to be in the east and serve northern european food. Sentence4: I also need a train on Thursday. London Liverpool to Cambridge. Sentence5: I was able to book you a table. Your reference number is F75434P4 . Is there anything else I can do for you? Sentence6: I'm afraid I don't have any matches. Do you have any other preferences? Sentence7: Great thank you for all your help today. Sentence8: There are three trains that arrive before 13:00. The closest arrival would be 11:07. What time would you like to depart? Sentence9: TR8805 will leave at 7:39 and arrive by 9:07. It will cost 16.60 pounds per ticket. Would you like to book seats? Sentence10: Sure. There is a moderately priced restaurant called Curry Prince. Would you like to go there? Sentence11: actually i want to arrive before 10:45 if possible. Sentence12: Can you see if there's any Indian restaurant? Sentence13: Yes, I would like that for 7 people as well. Sentence14: Yes. Please book us a spot for 7 people on Thursday at 13:00. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System