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: I do not, thank you for the information Sentence2: OK, what is your departure station and what day are you traveling? Sentence3: I have 6 expensive British restaurants. Is there an area of town you'd like to be in? Sentence4: I would recommend the grafton hotel restaurant, located at Grafton Hotel 619 Newmarket Road Fen Ditton on the east side of town. Do you need more information? Sentence5: sorry, there are no trains from leicester to cambridge on wednesday. Sentence6: Okay, sorry about that. I hope we can help you in the future. Sentence7: I'm departing Leicaster on Wednesday. I need a booking for 1 person with a reference number please. Sentence8: I'm sorry, there are no trains that meet your criteria. Do you have any alternative options? Sentence9: No, there is no particular area I would like to be in. Sentence10: Hello, I'm looking for an expensive restaurant that serves british food please Sentence11: Okay, may I help you with anything else? Sentence12: Are you sure there are no trains from leicester to cambridge on wednesday before 14:45? That seems odd to me. Sentence13: i would also need the phone number Sentence14: I really only need a train for that route. Thanks for your help. Sentence15: Yes, I'm looking for a train that's heading to Cambridge by 14:45. Sentence16: 01223241387 is the phone number. Can I help you with anything else today? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System