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: Thank you, I also need a train from london kings cross to cambridge. Sentence2: I'm glad I was able to help. Thanks for using our service today. Sentence3: Did you have a date or time in mind? Sentence4: I have a lot of nightclubs in the city center. Do you want me to recommend one to you? Sentence5: I need 6 tickets and the reference number Sentence6: TR5729 arrives by 14:08. Would you like a ticket? Sentence7: I need to travel saturday and get there by 14:45 Sentence8: Thanks for all the help! Sentence9: Sure! The Kambar is a nightclub located in the centre. The address is 1 Wheeler Street. The entrance fee is 5 pounds. Sentence10: Booking was successful, the total fee is 113.28 GBP payable at the station . Reference number is : IHJSSXL2 Sentence11: i'm looking for a nightclub Sentence12: Yes please. And can you tell me what area it's in and what the entrance fee is? And the address too, of course. Question: Who has spoken the sentence 3? (A) User (B) System
Answer:
Answer: (B) System