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 also need to book a hotel as well, called the Lensfield hotel. Sentence2: A total of 6 people and for 2 nights starting on Saturday. Sentence3: That is wonderful. I think I am all set for now. Goodbye for now. Sentence4: I need to arrive by 11:45 on Saturday. Sentence5: That fits my schedule, yes please reserve 6 tickets for us, and let me know the reference number when you have it. Sentence6: Can I interest you in a place to eat while you're town? We have many great restaurants. If you need reservations please let us know. Goodbye. Sentence7: Okay, your all set! Reference number is Z34WGFK7 . Cost of the tickets are 21.12 GBP payable at the station. Is there anything else today? Sentence8: Booking was successful. Reference number is : C52VRAL6 . Anything else? Sentence9: Sure, I can help you with that. How many people will be staying, and for how many nights? Sentence10: What day will you travel? Sentence11: I'd like to find a train leaving from Ely to go to Cambridge, please. Sentence12: Could you try one night instead of two? Sentence13: I'm sorry, that day is not available or you would need a shorter stay is there anything else I could do instead? Sentence14: We have 3 trains, TR0554 leaves at 09:35 and arrives at 9:52, would you like me to book you a trip? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User