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: No thank you that will be all Sentence2: That's perfect. Can you book for 4 people please? Sentence3: Booking was successful, the total fee is 32.32 GBP payable at the station . Reference number is : 4YOCRING . Sentence4: Is there anything else that I can assist you with today? Sentence5: I'd like Persian food. Sentence6: Thanks for using our services, have a lovely day. Sentence7: Okay how about chinese food? Sentence8: i am also looking for a train. The train should leave on sunday and should go to bishops stortford. The train should depart from cambridge and should arrive by 17:30. Sentence9: Any type is fine can you just give me the postcode of it? Sentence10: sure, what kind of cuisine are you looking for? Sentence11: I'm sorry I have no restaurants serving Persian food. Sentence12: Thank you. That is all the information I need. Sentence13: Rice House is in the center, is cheap, and post code is cb12bd. Sentence14: Okay the TR3600 leaves at 15:26 and arrives by 16:07. Sentence15: I'm hoping you can help me find a restaurant. Sentence16: There are a lot of chinese restaurants in town. Do you have a preference on area or price range? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System