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: Departing from cambridge and I want to arrive somewhere around 20:00, can you get me 7 tickets and I'll need the reference number too. Sentence2: I am looking for a train leaving Cambridge. Sentence3: I definitely want to stay in the east part of town. Sentence4: I would like to go to leicester and leave on friday. Sentence5: Yes , I also need to find a place to stay. Preferably 4 stars and a guesthouse. Sentence6: thank you, you've been quite helpful Sentence7: I have quite a few trains that fit your criteria. Is there a certain time you need to leave or arrive by? Sentence8: How about 1 night? Sentence9: That sounds great, thank you. Could you book that for me for 7 people? I will need the reference number as well. Sentence10: The price range doesn't matter, but could you pick one and book it for 3 nights for 7 people starting Tuesday? Sentence11: We have quite a few, I'm sure we'll be able to get you where you want to go. Where is that, exactly? Sentence12: Glad to help. Have a lovely day. Sentence13: I completed your booking. The reference number is C11MOBV7 . Is there anything else I could help you with? Sentence14: I have six entries matching your request. Would you prefer cheap or moderate price range? Sentence15: The TR2508 arriving at 19:06 sound okay to you? Sentence16: I was able to book the A and B Guest House for 1 night. Booking was successful. Reference number is : 995PR933 . Sentence17: I'm sorry. There are no rooms available for that stay. Can you choose a different day or shorter stay? Sentence18: Sure! Our database contains 18 guesthouses rated 4 stars. To narrow down the search, could you tell me in what part of town you'd like to stay? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User