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 have no preferences. You can just pick one. I'd like it for 7 people for 5 nights starting from saturday. Sentence2: TR4494 will depart at 17:19 on saturday and arrive by 18:09. Would you like me to book it for you? Sentence3: I need it for Saturday and I want to arrive by 18:15. Sentence4: This is unavailable would you like to book a shorter stay or a different day? Sentence5: Let us know if you need anything else. Good bye. Sentence6: Great! You're booked for 3 nights at Bridge Guest House with reference number AH7L4RXZ . May I help with anything else? Sentence7: No, it does not offer that. Would you like something that does? Sentence8: Great! You have helped me tremendously. I don't need anything else. Thank you! Sentence9: Yes please. Can you book 7 tickets on that train? I'd like a reference number if possible. Sentence10: I am looking for a guesthouse to stay at in the moderate price range. Sentence11: When do you need that train? Sentence12: Does it have free parking? Sentence13: ok, I have a couple that meet that criteria. Would you like 3 or 4 stars? Sentence14: Yes, I need a train out of Peterborough into Cambridge, please. Sentence15: How about the a and b guest house? Sentence16: How about 3 nights for the same day and number of people? Sentence17: Booking was successful, the total fee is 92.4 GBP payable at the station. Reference number is : 8JPQ3AQT . Sentence18: Yes. I need free parking, and I prefer the southern part of town. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System