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 great, have a good day! Sentence2: Yes, please. Could I have the reference number as well? Sentence3: Certainly. Can you tell me what day you would like to travel? Sentence4: fitzbillies restaurant serves british food would that be okay? Sentence5: I do not not care, it just needs to be expensive. Sentence6: The one closest to your desired arrive by time will arrive at 12:55 and depart at 11:36. Would you like me to book this for you? Sentence7: Yes, may I have the address? Sentence8: I'm happy to help! There are a great deal of restaurants there. What type of food did you have in mind? Sentence9: I was able to book you 6 tickets for that train. Your reference number is PSQ9JOOI . Is there anything else I can help with? Sentence10: The train should leave on thursday. Sentence11: the train should arrive by 13:45 and book for 6 people and give me the reference number please Sentence12: I'd be happy to, but can you tell me which day you'd like to travel on? Sentence13: Sure, they're located at 51 Trumpington Street City Centre. Can I help you with anything else today? Sentence14: No, I do not think so. Thank you for your help. Sentence15: Yes, can you help me find a train that can take me from Cambridge to Norwich? Sentence16: I'm so hungry - can you find me a place to eat in the city centre? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User