You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
One 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
Solution is here: Answer: (A) User
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

Now, solve this: Sentence1: You're welcome. Call back if you need further bookings or assistance. Sentence2: On Friday after 10. Sentence3: What you are looking for can not be found. Is there any other area you would mind searching in? Sentence4: Can you also give me the travel time? Sentence5: Thanks! Can you also see if there are any expensive, 4-star guesthouses in the north area of town? Sentence6: Yes, that will be great. How much does a ticket cost? Sentence7: A ticket is 23.60 pounds. Sentence8: Okay. What day will you be traveling? Sentence9: Avalon is a moderate priced 4 star guesthouse in the north part of town. It has free internent. Would you like more information or can I book it for you? Sentence10: Can you book it for 4 people and 4 nights starting from Monday? Sentence11: The travel time is 51 minutes. Sentence12: Booking was successful.Reference number is : 1VF2W9YC . Sentence13: The TR1502 leaves friday at 11:00. Sentence14: No I want to stay in that area. What other hotel accomadations are in the area? Sentence15: I need to take a train from Cambridge to London Kings Cross, it would need to be after 10. Sentence16: Thank you! That is all. Question: Who has spoken the sentence 9? (A) User (B) System
Solution:
Answer: (B) System