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 need to find a train out of King's Lynn that will arrive by 17:45. Sentence2: The reference number is GETHUNTL . What else can i do for you? Sentence3: That sounds great. Can you book me 4 tickets on that train please? Sentence4: I have 4 options available. Do you have a preference of guesthouse or hotel and price range? Sentence5: Booking was successful, the total fee is 31.36 GBP payable at the station . Reference number is : 8K88DU7K . Sentence6: There is nothing more for me. Thanks for your help, adios! Sentence7: Cambridge, and it will be on sunday. Sentence8: I have train TR6003 leaving cambridge at 5:11 and arriving at 5:58 on sunday. Sentence9: The Lensfield Hotel meets your criteria. Would you like me to book it? Sentence10: I would like a hotel and my only preference, besides being in the south, is I would like it to have a 3 star rating please. Sentence11: Yes please, 4 people for 2 nights starting on Sunday. Sentence12: Could you please provide me with the reference number? Sentence13: Okay, adios amigo! Glad I could help! Sentence14: Awesome! I also need help finding a place to stay in the South. Not driving so don't need parking. Sentence15: Can you please provide me with destination of the train so I can better assist you? Sentence16: Okay, I will get that booked for you. Is there anything else I can assist you with? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User