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: Booking was successful. Reference number is : I4AFI8ET . what else do you need? Sentence2: you want to book it for 1 people and 2 nights starting from monday. no parking Sentence3: 6 of the 7 places that match your request are guesthouses. Is that acceptable? And what pricerange are you needing? Sentence4: I am excited to visit some of your attractions. Can you help me find a place to stay in the east part of town? Sentence5: Yes, a guesthouse would be great. I'd like for it to be in the moderate price range. Sentence6: I'm looking for an attraction called the Cambridge Corn Exchange? Can you provide me with more information? Sentence7: Thanks. I believe the car was the last thing I needed. Sentence8: The cambridge corn exchange is located in the centre of town on wheeler st. The phone number is 01223357851 and the postcode is cb23qe. Anything else I can help with? Sentence9: I sure can. I book a white tesla for 15:15. The reference number is 07560492867. Sentence10: Ok. There are three choices. Do you need free parking? Sentence11: Alright, you are very welcome. Have a nice day! Sentence12: Can you book a taxi for me at 15:15 from the corn exchange to the guesthouse? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System