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: thank you for using this service good bye Sentence2: Free is great for entrance fee. I'll just need the postcode. Sentence3: I need to go Cambridge from London Liverpool street on Thurday, please. Sentence4: Sure. There are 7 options. Do you have any preference as far as entrance fee? Sentence5: Okay! How about the 13:59 train? It's the earliest one after 12:30. Sentence6: there is a train leaving for london kings cross at 13:00, would you like me to book a seat for you? Sentence7: No, thank you - were you just going to book a random day for me? Sentence8: Where are you traveling from and your destination? Also what day? Sentence9: Cafe Jello gallery is free. Their postcode is cb30af. Sentence10: No thank you. You've been very helpful. Have a great day! Sentence11: I'm also looking for a train to leave after 12:30 Sentence12: What about a museum on the west side? Sentence13: I booked you 6 tickets on the TR4187. Your reservation is OQ5TX031 . A total of 99.6 GBP is due at the station. Is there anything else I can help you with? Sentence14: THat sounds great, can I please get 6 tickets? Sentence15: I would like to find out about going to a park in the west. Sentence16: There are no parks in the west. Would you like me to look in another area, or for a different attraction? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User