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, that will be good! I need eight tickets, please. Sentence2: The address is 732-734 newmarket road. Do you need any more information? Sentence3: What is their phone number? Sentence4: What is the address of the hotel? Sentence5: Can you also give me some information on the Leverton House hotel? Sentence6: Thanks! That's all I needed. Goodbye! Sentence7: I want to leave on wednesday and arrive by 10:15. Sentence8: You're welcome. Please let us know if you need any more assistance? Sentence9: There are 5 trains arriving by 10:15, would you like to book one leaving at 8:24 and arriving at 8:52? Sentence10: You now have 8 tickets on the TR7667. Your reference number is A1S8REZC and your total will be 80.8 GBP, payable at the station. Is there anything else I can do for you today? Sentence11: I found 133 train trips, do you have a date and time you would like to travel? Sentence12: Their phone number is 01223292094. Sentence13: I'm looking for a train departing from Stantsted Airport going to Cambridge. Sentence14: I certainly can. What would you like to know about the Leverton House? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User