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

Let me give you an example: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
The answer to this example can be: Answer: (A) User
Here is why: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

OK. solve this:
Sentence1: No, I am not sure I am traveling just yet. Thanks for the information, I am all set for now. Have a nice day. Sentence2: Sure, where will you be boarding and what day would you like to leave? Sentence3: Okay, is there anything else I can help you with? Sentence4: I will board at King's Lynn, before 13:30 on Tuesday. Sentence5: No. Goodbye. Sentence6: I would like the train that arrives closest to 13:30 please. I will also need the departure time. Sentence7: I have 8 routes which will arrive in Cambridge by 13:30. They leave hourly on the :11 from 05:11 to 12:11, lasting 47 minutes. Would you like to book? Sentence8: Thanks for contacting the Cambridge TownInfo Centre and have a great day! Sentence9: TR8699 departs Tuesday at 12:11 and arrives in Cambridge at 12:58. Would you like to book it? Sentence10: I need a train to Cambridge. Question: Who has spoken the sentence 9? (A) User (B) System
Answer:
Answer: (B) System