Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Positive Example 1 -
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
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: 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
Output: 


Answer: (A) User