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: That's all I needed today. Thanks for your help. Goodbye! Sentence2: Okay, the three results are the same. I still recommend charlie chan. Do you need more help today? Sentence3: Yes, I'm also looking for a cheap Chinese food restaurant. Can you recommend one? Sentence4: I don't have a particular area in mind but I do also need free parking please. Sentence5: How about the hamilton lodge. It is in the north of town and meets your requirements including parking. Sentence6: I should have mentioned I am looking for a restaurant in the centre. Sorry about that. Sentence7: Sure, there are 4 options. I recommend charlie chan. would you like a booking? Sentence8: that sounds nice but will you book it for 7 people and 4 nights starting from wednesday Sentence9: Thanks for trying. Let's do Thursday, please. Sentence10: I would like a 3-star hotel with free WiFi, please. Sentence11: Booking is all set your ref number is 05MF6IQL Sentence12: I'm sorry, I am unable to book it for that time. Do you have another time that will work? Sentence13: Your booking was successful, the reference number is CUY4J5PR . Is there anything else I can help you with today? Sentence14: Yes, please book that restaurant for me. It'll be 7 people on wednesday at 14:45. I'll definitely need a reference number. Sentence15: Yes, there are 5 different options to choose from. What area will you be staying in? Sentence16: Thank you enjoy the rest of your day! Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User