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

Sentence1: It's alright. I'm also looking for a train that leaves on Thursday from Cambridge. I'm trying to get to Stansted Airport by 08:30. Sentence2: Booking was successful for TR7966, the total fee is 80.8 GBP payable at the station. Your eference number is : NT1R53H8 . Can I help with anything else? Sentence3: You, too! Goodbye! Sentence4: That is unfortunate. Could you provide me with their phone number so I can ask them myself? Sentence5: Unfortunately I do not have access to that info. Sentence6: It doesn't matter. Let's take the 5:40. Sentence7: Not a problem! You can call them at 01954781018! Sorry about that! Sentence8: Goodbye and hope to see you again. Sentence9: I planning a trip to Cambridge toward the west side I would like information on the entertainment in this part of the town . Sentence10: That's all I needed. Thank you! Sentence11: I'm glad I could be of service, have a good day. Sentence12: Perfect. Just one ticket? The cost will be 10.10 pounds. Sentence13: There are three possible trains that meet your criteria. Would you like to depart at 05:40, 06:40, or 07:40? Sentence14: Yes, how much is the entrance fee? Sentence15: I actually need 8, I'm taking my family with me. Sentence16: We have Whale of a Time in the west. Would you like any information on this attraction? Question: Who has spoken the sentence 9? (A) User (B) System
Answer: (B) System