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: Sounds great. I'd like to make a reservation for Saturday. Sentence2: Thank you for calling. Please let us know if we can be of assistance in the future. Have a great trip! Goodbye. Sentence3: I would also like a moderately priced place to stay. Sentence4: free wifi and 4 stars please Sentence5: May I please have information about a train to Stevenage, leaving on Tuesday? Sentence6: Yes, please. Sentence7: Your booking was successful. The reference number is 5KPWKTTX . Can I help with anything else today? Sentence8: Do you have a certain time you would like to leave after or arrive by? Sentence9: Certainly. Is Cambridge your departure point? Sentence10: Any that leave after 08:00 would be fine. I'll need a booking for 5 people, please. Sentence11: You are booked for the TR4546 train. Your reference number is NALGEDH3 and 64 GPB will be due at the station. Is there anything else? Sentence12: Is there a certain area that you perfer? Maybe free parking or wifi? Sentence13: I would be happy to book this for you. Will you be booking for 5 people? Sentence14: I have the guesthouse called Avalon available. It has 4 stars and is moderately priced. It's in the north. Would you like me to book this? Sentence15: Yes for 5 people and 3 nights. Sentence16: No, thank you, that's all I need. Thanks for your help! Question: Who has spoken the sentence 3? (A) User (B) System
Solution:
Answer: (B) System