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: No thank you. I just need the price and travel time please. Sentence2: I'm looking for a hotel with a 4 star rating to stay at and I don't need to have internet. Can you help? Sentence3: They are the Huntingdon Marriott Hotel which is in the west area, and the University Arms Hotel which is in the Centre. Sentence4: The University Arms sounds good. Sentence5: Okay. Your booking was successful and your reference number is HLD21MYL . Sentence6: Thank you for calling today. Please let us know if there is anything else we can do to help. Goodbye. Sentence7: Would you like me to make a reservation for you? Sentence8: I have about 3 options that meet those requirements. All offer free parking and internet. 2 are expensive and 1 is cheap. Do you have a preference? Sentence9: I will be leaving Cambridge and arriving at Ely. Sentence10: What town are you leaving from? What time do you want to depart or arrive, please? Sentence11: We have 10 trains that match your criteria. The TR0996 leaves at 05:50 and gets to Ely by 06:07. Would you like to book you a seat on it? Sentence12: I'm glad I could help you today. Is there anything else you need? Sentence13: Sure! The travel time is 17 minutes and it costs 144.40 pounds. Sentence14: Perfect. You have been so much help! Sentence15: Thank you. That is all I need. Sentence16: Yes please, I also need a train to Cambridge, on Thursday. Sentence17: Tell me about the expensive options. Sentence18: I need it for 8 people, 2 nights from Monday. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System