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: TR8842 will get you there at 16:08. May I book it for you? Sentence2: There are 12 options for moderately priced guesthouses, any area preference? Sentence3: Your reference number is RRNTTR7Z . We also have quite a few guesthouses, do you have an area you'd like? Sentence4: Please try 2 nights on Friday and see if that works. For a guesthouse, please. Sentence5: The area doesn't matter. I just need one with rooms available for 3 nights starting on Friday. Sentence6: I would like to leave from london kings cross. Sentence7: I am so sorry, can we start over with the guesthouse? I do need a moderate, but for 8 people. Still arriving Friday for 3 nights. Sentence8: Could we please try a different hotel that is close to The Acorn Guest House? Sentence9: I checked with all 7 guesthouses in the north and none are available for even a one day stay starting Friday. Could we try a different day? Sentence10: I need it to be for 2 people. Sentence11: ok I have one leaving by 05:17, TR5219, would that be fine? Sentence12: Please tell me what town are you departing from and what is your destination? Sentence13: Hi there. Can you help me find a train leaving on Friday? Sentence14: May I have a reference number for that train, please? Sentence15: For the guesthouse, do you have one in the moderate price range that includes free parking? Sentence16: On Friday, I would like to arrive in Cambridge by 16:45. Sentence17: There are over 100 trains available, could you please provide a departure location? Sentence18: Yes, I need it for 8 people. I'm also looking for a guesthouse type hotel with free parking in the moderate range. Sentence19: Well I guess I'm out of luck, unless there are hotels in adjoining towns I could try. Sentence20: Do you have a preference for the number of stars or the area? Sentence21: The Acorn Guest House on 154 Chesterton Road should be sufficient, shall I reserve a room for you now? Sentence22: Yes, please, and I'll need the reference number. Sentence23: It was a pleasure being of service. Enjoy your stay in Cambridge and call again if you need any further assistance. Goodbye! Sentence24: Do you have one that arrives a little closer to 16:45. I don't want to get in too early. Sentence25: For how many people? Sentence26: Your room is booked at acorn guest house for 8 people and 2 nights starting on Friday. Reference number is 3M1I4Q7S . Anything else I can help with? Sentence27: Sorry, we only work with places in cambridge. Sentence28: I was unable to book that room for you. Can we try a shorter stay or a different place perhaps? Sentence29: The booking was still unsuccessful. Would you like to try a different day? Sentence30: No, that should be all I need. Thanks for your help! Sentence31: Sure, please try 2 nights. Sentence32: I could not book a room for that number of nights on those days in that area. Perhaps try a different area? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System