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: Yes please. I need tickets for 2 people. Sentence2: Okay, booking was successful, the total fee is 150.19 GBP payable at the station. Reference number is : 3YS7IOSA . Anything else I can help you with? Sentence3: I want a place to stay in the north of town. Sentence4: How about train TR7324 that leaves at 21:40 and arrives by 24:23. Would you like to make reservations on that? Sentence5: I am also looking for a train. Can you help me with that? Sentence6: The train should go to cambridge and should leave after 21:15. The train should depart from birmingham new street and should be on the same day as the hotel booking Sentence7: I would like something with a 2 star rating if possible. Sentence8: I need the train to leave after 21:15. I also need it booked for two people. Sentence9: That will be all today.. Thanks. Goodbye Sentence10: Okay, any other preferences? We have plenty of options. Sentence11: Yes your reference number is N9AC95R7 . I hope you enjoy your stay. Sentence12: I have train TR3736 leaving at 6:40 and arriving at 9:23. Would you like to book that? Sentence13: We have ashley hotel on chesterton road or lovell lodge on milton. Would you like me to book one of those? Sentence14: Bood ashley hotel for 2 people and 3 nights starting from Thursday. What is the reference number please? Sentence15: Enjoy your stay in Cambridge! Sentence16: Of course. When would you like to leave by? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User