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 will be starting from Tuesday. Sentence2: I'm looking for a cheap guesthouse. Sentence3: No that is all, thank you! Sentence4: All set. Your reference number is ATMXXNQI . Sentence5: Would you like us to book a ticket for you? Sentence6: Before I can book it I need to know what day you will be staying? Sentence7: I have train TR2715 that leaves at 7:39 and arrives at 9:07. Sentence8: I also need a train for Tuesday that leaves London Liverpool Street and arrives in Cambridge by 16:15. Sentence9: Alright, have a lovely day! Sentence10: great, i have 9 options for you. Sentence11: Thanks! You're welcome, have a great day! Sentence12: Great. I need it for 7 for 5 nights. Sentence13: TR1395 arrives at 15:07. Sentence14: No, that's all I needed. Thanks! Sentence15: Would you like me to book anything else or provide anymore info? Sentence16: How about Finches Bed and Breakfast at 144 Thornton Road? Sentence17: I really prefer to stay in the west part of town. Do you happen to have anything in that area? Sentence18: Do you have a train less early? One that arrives around 16:15? Sentence19: great day and thanks for helping Sentence20: Thank you for your help. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User