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 would like to know if it is available for 8 people for 4 nights starting Saturday Sentence2: Hi, I'm looking for a hotel by the name of Acorn Guest House. Sentence3: Yes please, can you help me find a train from Birmingham New Street to Cambridge on Friday? Sentence4: Sure, what would you like to know about it? Sentence5: Booking was successful. Reference number is : ZZPP7K9D . Is there anything else I can help you with today? Sentence6: There are 12 trains matching your search. Will you be wanting me to book one for you? Sentence7: I would like to leave after 12:30 and leave on Friday. Sentence8: Booking was successful, the total fee is 600.79 GBP payable at the station. Your on train number TR4431 and your reference number is FL53PCPE . Anything else today? Sentence9: Yeah, choose one and book it for 8 people. Then give me the reference number Sentence10: Sure, what time would you like to leave? Sentence11: Have a nice trip! Sentence12: No, that's all for me! Thanks so much, goodbye! Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User