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: In the north please. Sentence2: Yes please, can you book 2 tickets and can i get a reference number please? Thank you. Sentence3: TR1703 leaves cambridge on sunday at 19:40 and arrives at stansted airport at 20:08. The cost is 8.08 pounds. Would you like me to book it for you? Sentence4: Okay, great. Let us know if you need anything else. Sentence5: It doesn't matter what time I leave as long as I arrive at the airport by 20:45. Sentence6: What time would you like to leave? Sentence7: Restaurant two two is an expensive french restaurant in the north. Would you like a reservation? Sentence8: I want an expensive french place to dine in. Sentence9: no i want the post code and address Sentence10: Where are you departing from, What day do you want to travel and how many people can I book tickets for? Sentence11: Sure, do you prefer the centre of town or the north end? Sentence12: Thank you, my trip is planned, that is everything. Sentence13: a train. The train should arrive by 20:45 and should go to stansted airport Sentence14: Sure, they are located at 22 Chesterton Road Chesterton and their postcode is cb43ax. Is there anything else you need? Sentence15: Booking was successful, the total fee is 16.16 GBP payable at the station . Reference number is : 86BN010L Sentence16: Departing from Cambridge on Saturday. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System