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 can recommend little Seoul. Sentence2: I am also looking for a restaurant. The restaurant should be in the centre and should be in the expensive price range. Sentence3: Oh, I am so sorry. I will be leaving Broxbourne, not Cambridge. Sentence4: Sounds great can I get the address? Sentence5: I need to take a train to here from Broxbourne, this will be on saturday. Sentence6: No problem! What time would you like to leeave by? Sentence7: You're welcome, have a great day! Sentence8: I want to leave after 8:00, please. Sentence9: The address for Little Seoul is 108 Regent Street City Centre Sentence10: The train should leave after 08:00 Sentence11: I have 19 trains from Cambridge to Broxbourne on Saturday. What time are you wanting to arrive by? Sentence12: how about train 1997? It leaves at 09:01. Sentence13: That would be great. Can you book me for 8 tickets? Sentence14: Did you have a specific kind of food in mind? Sentence15: No thank you that will be all Sentence16: Yes, hopefully Korean. I love it. Sentence17: Your Booking was successful, the total fee is 114.56 GBP payable at the station . The Reference number is EFGWY22I . Can I assist with anything else. Sentence18: TR9384 leaves Broxbourne at 8:32. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System