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: Do you have anything in the east? Sentence2: OK, I'm all set here. Thanks for your help. Sentence3: You can change any other criteria, but the price range should be the same as the city centre north b and b. Please try again. Sentence4: Unfortunately the booking was unsuccessful, would you like to try another hotel? Sentence5: The city centre north b and b meets your criteria. Do you want to make a reservation? Sentence6: Nothing else is available on the cheap side. Something else perhaps? I am sorry. Sentence7: Booking was successful at worth house. Reference number is : E2KQ4G5L . Sentence8: The address is 152 chesterton road. Sentence9: There is nothing in the east with zero stars and free parking. Do you want to change the star rating or other criteria? Sentence10: Yes, I have two guesthouses that fit that criteria. Would you like to stay in the north or centre? Sentence11: Yes, I would like to make a reservation on Saturday for 6 people and we will be staying for 2 nights. Sentence12: Yes i would like something in the same pricerange. Sentence13: No can you please check in the north instead then? Sentence14: That's great. Thanks. Do you have their address? Sentence15: Hello! I'm looking for a place to stay with free parking and zero stars. Sentence16: Enjoy your stay at the worth house. Have a great day. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System