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 can certainly help with that. Where are you departing from? Sentence2: I am departing from cambridge and need to arrive by 12:00. Sentence3: Is there a time you want to leave by? Sentence4: We have over 400 trains that meet that criteria, what destination did you want to go to? Sentence5: You're welcome, and have a great day. Sentence6: Booking was successful, the total fee is 151.19 GBP payable at the station. Reference number is : A6Z2U9VN . Is there anything else I can help you with? Sentence7: No thanks, but I'd like some information on a train next. Sentence8: I have the TR7505 that will arrive by 11:06. Would you like me to book that for you? Sentence9: No, that should be all. Thank you! Sentence10: A hotel on the east side with free internet and parking if thats doable. Sentence11: I need a place to stay that includes parking Sentence12: I need the postcode too. Sentence13: The postcode for that is cb13lh. Do you want me to book a room now? Sentence14: Would you have a preference for an area or price? Sentence15: Yes! Please book for me and three friends. I need the reference number as well. Sentence16: I would like to arrive by 12:00, which ever one is closest to that. Sentence17: I have one hotel on the east that offers both free wifi and parking. It is the Express by Holiday Inn Cambridge. It is expensive and has a 2-star rating. Sentence18: This will be on a Friday and I'm going to Leicester. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User