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: Are there any expensive european restaurants around? Sentence2: I found 5 expensive european restaurants. Which area of town would you like to look in? Sentence3: I would suggest train ID TR5722 which leaves at 21:59 and arrives at London Liverpool Street at 23:27. Sentence4: No thanks. I think that's all. Have a nice day. Bye. Sentence5: City Stop Restaurant, 01223363270, post code is, cb41uy,Cambridge City Football Club Milton Road Chesterton. Anything else? Sentence6: That sounds like it would work. Please make a reservation for 4 people on that train, please. Sentence7: I want to travel on Tuesday Sentence8: What times do you have available? Sentence9: i need it to go to london liverpool street Sentence10: Alright, the booking was successful, the total fee is 66.4 GBP payable at the station. Your reference number is: RLF15GH7 . Can I do anything else for you? Sentence11: Great! You're quite welcome. Goodbye! Sentence12: I also need a train leaving cambridge after 21:15. Sentence13: What is your destination? Sentence14: I don't have a preference, what do you recommend? I'll need the area, address and phone please. Sentence15: What day would you like to travel? Sentence16: I have several. Is there a time you would like to arrive by? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User