You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I'd be happy to help with your request, to help narrow the results down where will you be departing/arriving and what time? Sentence2: Hello, I'd like some information on a restaurant in the centre. Sentence3: Okay, let's book it for five people. Sentence4: There is a train that leaves at 5:17. Sentence5: TR8522 arrives at 07:07. Sentence6: Ok, Thankk you. Bye now. Sentence7: How about HK Fusion, located at 21 Burleigh street? Sentence8: Thats okay can you book that? Sentence9: It should go to Cambridge and should arrive by 09:00 Sentence10: Yes book it for Friday. 5 people at 13:00. Sentence11: welcome and thanks for using our services Sentence12: I would like somewhere expensive that serves chinese food Sentence13: I need to depart from London liverpool street on friday. Ineed to arrive in Cambridge by 9:00 Sentence14: I have your reservation at HK Fusion for 5 people on Friday at 13:00, your reference number is XAMSDTRY . Can I help with anything else? Sentence15: I am also looking to book a train the same day! Sentence16: Could you please confirm where you are departing from first? There are many trains and i want to make sure i book you the right one. Sentence17: The booking was successful. The total fee of 83 GBP is payable at the station. The reference number is L4G0ZWC2 . Sentence18: There are many options. What's your price range and what type of food do you want? Question: Who has spoken the sentence 9? (A) User (B) System
Output:
Answer: (B) System