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 be in the centre of town. Sentence2: You are most welcome, contact us if you need more assistance. Sentence3: Hello! I need to find a train leaving Wednesday. Sentence4: I booked it for Wednesday. Your reservation number is EQHAMTOB, is there anything else? Sentence5: Yes I will book it for you and provide a reference number Sentence6: I need one that can fit three people. I need three tickets. Sentence7: I have found two different options that fit your request. Would you like to leave at 05:29 and arrive by 06:07 or leave at 07:29 and arrive by 08:07? Sentence8: I have 5 restaurants that are Asian Oriental, do you have an area preference? Sentence9: I need to go to Cambridge from bishops stortford on wednesday and arrive by 09:15. Sentence10: I'm sorry, but we don't have any Greek restaurants in town. Would you like to try a different type of cuisine? Sentence11: That's all I need for now. Thanks for the help. Sentence12: There are 3 in the town centre. Would you like cheap or moderately priced food? Sentence13: There are 2,828 trains scheduled to travel on Wednesday. Where are you planning on departing from and where is your destination? Sentence14: I prefer to arrive by 08:07. Can you suggest a cheap greek restaurant? I'd like a reservation for 3 people at 10:00. Please provide reference numbers. Sentence15: Cheap price sounds good to me. Sentence16: Thank you. Once you provide me with the reference number that is all I need. Sentence17: I can book for 3 people for either of those trains. Is there one of the times you prefer? Sentence18: I also like Asian Oriental. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User