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 need a 4 star place that has free wifi. Sentence2: Any particular area you would like to stay? Sentence3: Would you like to try allenbell? Sentence4: No thanks. Go ahead and book the train for 4 people and please provide the reference number. Sentence5: I don't really have a preference. Sentence6: i dont mind either. Sentence7: Thank you that is all I needed. Sentence8: Leaving Cambridge this coming Sunday. Sentence9: I'm sorry, we don't have any trains arriving by 17:15. The earliest train will arrive at london kings cross at 19:51. Do you need anything else? Sentence10: I have 21 trains that match your request. Where will you be departing from? Sentence11: Okay! What price range would you like? Sentence12: We have seven places, any preference on price or rating? Sentence13: You're welcome. Have a great day! Sentence14: Ok. We've narrowed to 6 options. Do you want parking? Sentence15: I need to find a train going to londons kings cross that would arrive by 17:15 Sentence16: Thank you. I also need to find a place to stay. Sentence17: I have made those reservations and the reference number is I4K0OYPF . Sentence18: In the East part of town, please. I need free WiFi. Sentence19: No parking is not a concern of mine. Sentence20: Your booking was successful, the total fee is 75.52 GBP payable at the station . Your reference number is : UMS71SR7 . Your train will leave at 19:00. Sentence21: Okay! Would you like to stay in a hotel, or in a guesthouse? Sentence22: Yes, please book me for 4 people, for 5 night starting on Tuesday. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System