Given the task definition, example input & output, solve the new input case.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
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
Output: Answer: (A) User
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 case for you: Sentence1: Thank you! Goodbye. Sentence2: The phone number is 01223257168. Sentence3: I'm glad I could help. Have a wonderful day! Sentence4: Hi, can you tell me the details of local hospitals? I'm looking for a hospital that has the Cambridge eye unit department. Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System