Teacher: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? If you are still confused, see the following 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: Answer: (A) User
Reason: 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 instance: Sentence1: Okay, please tell where you are going and where you are leaving from, and what day. Sentence2: Thanks for the service, goodbye. Sentence3: The reference number is,VAKDVQNB is there anything else I can do for you? Sentence4: Acorn guest house has that, will that work for you? Sentence5: I will need free wifi and parking. Sentence6: What time would you like to travel? There are trains every hour from 5:11. It takes 47 minutes to get there from Cambridge. Sentence7: I'm happy to be of service! Thanks for using the Cambridge TownInfo centre. Sentence8: I'd like to arrive by 17:30. Any trains that do that will be fine. I just need the price. Sentence9: TR8890 arrives at 16:58. It costs 9.80 pounds. Sentence10: I need a moderately priced 4 star hotel. Sentence11: book it for 7 people and 3 nights starting from sunday. Sentence12: I have many guesthouses that meet that criteria. Do you have a certain area in mind? Sentence13: I am going to Kings lynn from Cambridge. I leave Wednesday. Sentence14: I also need train tickets. Question: Who has spoken the sentence 4? (A) User (B) System
Student:
Answer: (A) User