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: No, there is nothing further. Thank you so much for your help! Sentence2: I would like to find a train to Kings Lynn. Sentence3: I am looking for information in Cambridge Sentence4: How about train 3112? It leaves Cambridge at 05:11 and arrives in Kings Lynn at 05:58. Sentence5: Okay! What would you like to know? Sentence6: Try some of our great restaurants during your stay. Goodbye. Sentence7: Thank you. Could you recommend a college to visit? Sentence8: When would you like to travel to Kings Lynn? Sentence9: Thank you. How much would it cost? Sentence10: 01223334900. That is in the Centre. Is there anything else? Sentence11: You are so welcome! Have a great time! Sentence12: On Friday, and I want to arrive by 19:15. Sentence13: It will cost 9.80 pounds per ticket. Sentence14: Perfect. Could you tell me their phone number and area? Sentence15: Thank you, I will. Sentence16: how about christ's college? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System