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 train from Cambridge as well. Sentence2: What time does the 15:51 train arrive? Sentence3: I'm looking for a restaurant called The Nirala. Can you tell me where it is? Sentence4: Sure! What is your destination? Sentence5: Yes as close to 16:45 as possible, book for 2 people please Sentence6: It leaves at 15:00 and gets there at 15:51, sorry for any confusion. Sentence7: thank you and enjoy your stay in our city! Sentence8: It's located at 7 Milton Road Chesterton. Would you like me to book a table? Sentence9: You're all set! Your reference number is QMY8NA1T . Do you need anything else? Sentence10: Would you like me to book the 15:51 train? Sentence11: Okay there are 6 trains that match. Shall I complete a booking? Sentence12: Could you please book a table for 2 at 14:45 on Wednesday Sentence13: I have booked tickets for 2 people, and your reference number is UBY652ER . Anything else I can do for you? Sentence14: I am going to london kings cross on saturday Sentence15: Thank you, that's all for now. Sentence16: The train needs to arrive by 16:45 Sentence17: I have a train that leaves at 5:00 on Saturday. Would you like me to book it for you? Sentence18: Yes please book that train for me. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User