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: Hi. I am looking for a train going to Cambridge on Thursday. Can you help me? Sentence2: No, I need a train that departs from stansted airport and it should leave after 11:30. Sentence3: Booking was successful for Thursday for one night. Your reference number is : GMAAU9LE . Can I help you with anything else today? Sentence4: I'm sorry but I was unable to book that hotel with your exact details. Would you like to book on another day or for a shorter stay? Sentence5: I'm also looking for a particular hotel. The name is Leverton house. Sentence6: The travel time on that route is 28 minutes. Is there anything else I can help you with? Sentence7: Train TR2775 departs from london kings cross. Sentence8: No, you have been a great help. Thank you and goodbye! Sentence9: Please. I'd like a room for myself, I'll be checking in on thursday and would like to stay for two days. Sentence10: Thank you, and please remember you can contact us at any time if you need any further assistance! Have a great day! Sentence11: Okay, try for one night instead please. Sentence12: The first train to Cambridge from the airport after 11:30 is TR9775, leaving at 12:24 and arriving in Cambridge at 12:52. Will that work? Sentence13: I think so. What exactly is the travel time on that one? Sentence14: Would you like me to make a booking for you? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System