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: Actually, I just needed the tickets. That is all for now. Thanks. Sentence2: I can work on booking that for you. I will be back with you shortly. Sentence3: Not sure. I'm strapped for cash, is it in the cheap price range? Sentence4: Can you book one of them for 3 people? Sentence5: I would like to check in on Tuesday. Sentence6: You're welcome, have a great day. Sentence7: You are all set, the reference number is 439JME60, can I help you with anything else? Sentence8: What day will you be checking in and for how many nights? Sentence9: Acorn guest house is available, would that work for you? Sentence10: Yes I am looking at a train that departs Stansted Airport for 3 people. Leaves Tuesday and arrives in Cambridge by 16:30. Sentence11: Ok, what kind of information about Cambridge do you need? Sentence12: Were you able to book it? Sentence13: You booking for 3 tickets on the TR9892 was successful. Your Reference number is : U5A2ZTWU . Is there anything else I can help you with today? Sentence14: city centre north b and b is on the cheap side or worth house. Sentence15: For 5 nights please. Sentence16: I would like a hotel that is in the north, has free parking, and is a guesthouse. Sentence17: and how many nights? Sentence18: great, what area are you thinking of? Sentence19: Yes, that would be great. I'll need three tickets, please? Sentence20: Train TR9892 leaves at 5:24 and arrives by 5:52 would you like me to boko that for you? Sentence21: I need to find an indian restaurant. Sentence22: I am looking for information in Cambridge Question: Who has spoken the sentence 9? (A) User (B) System
Answer:
Answer: (B) System