You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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
Solution: Answer: (A) User
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

New input: Sentence1: You're welcome. Have a great day! Sentence2: Certainly, the postcode is cb12as. Is there any other information you need? Sentence3: I'm looking for an expensive restaurant for tonight in the centre of town, can you provide me with a list of my options? Sentence4: That's all that I needed thank you! Sentence5: Kymmoy is located in the centre of town. Sentence6: May I have the postcode to Kymmoy please? Question: Who has spoken the sentence 3? (A) User (B) System
Solution:
Answer: (B) System