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: I'll be leaving Saturday after 19:45. Sentence2: Hello, I am looking to book a train departing from Cambridge going to Bishops Stortford. Sentence3: Sounds good! Have a wonderful day! Sentence4: I have train TR1159 that departs at 21:29 and will arrive by 22:07. Would that be something that would work for you? Sentence5: That's all I need for now. Thanks for your help. Goodbye! Sentence6: I have booked that and your reference number is 69TDODDN . Sentence7: Abbey pool and astroturf pitch looks good, would you like to get some information about that? Sentence8: It is located in the east, would you like any more information on this or more help with something else? Sentence9: I am also looking for swimming pools I can visit. Sentence10: Yes, what area is it located in? Sentence11: Book it for 8 please and i need the reference number. Sentence12: What is your departure day and time? Question: Who has spoken the sentence 6? (A) User (B) System
Answer:
Answer: (A) User