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 am also looking for a hotel called aylesbray lodge guest house. Sentence2: Thank you. Bye. Sentence3: Cambridge, I need to leave on tuesday too. Sentence4: Your confirmation number is G1AP9UFL . Can I assist you with anything else? Sentence5: Five trains match your description. The first leaves at 05:35. Do you want a seat on this train or on a later train? Sentence6: I'm looking for a train departing from ely and should arrive by 14:30. Sentence7: I can make you a reservation , how long do you plan on staying? Sentence8: Not at the moment. Thank you. Sentence9: The booking was successful and your reference number is 2KELM023 . Sentence10: This one will do. I will need to book for 4 people. Can I get the reference number once booked, please? Sentence11: ok, what is your destination? Sentence12: Okay, well, thank you for allowing me to help you. Enjoy your stay! Sentence13: I need a booking for 4 people for 4 nights starting on tuesday. Sentence14: Thank you for using the Cambridge TownInfo centre. Goodbye! Question: Who has spoken the sentence 12? (A) User (B) System
Answer:
Answer: (A) User