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: Oh great thank you for your help. Where is the train from cambridge to norwich depart from and when? Sentence2: Yes please, what is their entrance fee? Sentence3: I would like to book 6 tickets, please. And may I have the reference number once the booking is complete? Sentence4: Yes great! I have your reference number. It is HI5JHIXZ and the total cost of your tickets was 105.6 GBP. Please do enjoy your trip. Is there anything else I can help you with? Sentence5: There is a train leaving on Friday at 5:36. Would you like that one? Sentence6: I'm looking for a museum in the west area of town. Sentence7: There is a museum called Kettle's Yard in the west. Would you like to go here? Sentence8: Kettle's yard has a no entrance fee. Sentence9: No, I think that's all I need. Thank you for your help! Sentence10: I'm actually looking for one on Thursday that will arrive by 10:30. Are there any trains available for that? Sentence11: Sure thing, enjoy your trip! Sentence12: Yes! The price is 17.60 pounds. How many tickets would you like to book? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User