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: Sure, it's cb21rs. Sentence2: I am looking for a train leaving Cambridge. I need to arrive by 18:45. Sentence3: There are 4 I recommend scudamores punting co it's located in the centre of town. Would that interest you? Sentence4: Okay and what is your destination and what day would you like to travel? Sentence5: What about some kind of boating attraction? Sentence6: Thanks, that is all for now. Goodbye. Sentence7: book for 5people and get me the reference number Sentence8: Sure can you give me the postcode? Sentence9: Are there any attractions when we get there? Sentence10: You are all set the reference number is FH7BXL3F, the 5 tickets will come to 40.4 GBP. Sentence11: The TR5298 train arrives at 18:07. Would you like me to book it? Sentence12: There are many fine attractions in Cambridge. If you don't care about the area, I recommend the Botanic Gardens in the center of town. Sentence13: I'm glad I could help. Enjoy your visit. Sentence14: I want to go from Bishops Stortford to Cambridge on Sunday. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System