You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example input: 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
Example output: Answer: (A) User
Example explanation: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system
Q: Sentence1: I am looking to book a train to cambridge on saturday around 20:00 Sentence2: I'm not ready to book quite yet. Can you just give me the travel time, as well as arrival time of that train? Sentence3: Yes it leaves at 20:40 and arrives at 21:08. Sentence4: The train should go to stansted airport and depart from cambridge Sentence5: TR1120 leaves kings lynn at 20:11. Would that work? Sentence6: Ok, I could book the TR3128 which leaves at 20:40. Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System