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: Booking was successful, the total fee is 8.8 GBP payable at the station. Reference number is : T4I7L6BG . Can I help with anything else today? Sentence2: Alright, thank you, I think that will be all for today. Sentence3: There are 6 trains leaving that will get you there by 16:45, the closest TR3240 arriving at 15:52. Would you like to make a reservation? Sentence4: What time you like to leave? Sentence5: Yes please, thank you for your help. The reference number will come in handy. Sentence6: I can help with that! There are a total of 42 trains departing from Ely. What is your destination so I can narrow this down for you? Sentence7: The Hotpot sounds great! Can you please make a reservation for Friday for 2 people at 8 pm? Sentence8: I'm also looking for a expensive restaurant in the north. Sentence9: I would like to go to cambridge on thursday Sentence10: I am looking for a train departing ely and should arrive by 16:45. Sentence11: You're welcome. Let me know if there is anything else I can help you with. Sentence12: Choose your favorite. I do need an address and post code, please. Sentence13: Sure, do you have a food preference? I see Chinese, French, European and Asian Oriental. Sentence14: Again, thanks for all of your help today. Good bye. Sentence15: Sure! Your reservation at the hotpot for Friday for 2 people at 8 pm is successful. Would you like a reference number? Sentence16: How about The Hotpot? It is located at 66 Chesterton Road Chesterton and the postal code is cb41ep. Sentence17: I'm sorry at the moment I can not obtain that for you. Sentence18: Yes, please make me a reservation for two people on TR3240 arriving at 15:52. Sentence19: It doesn't matter what time I leave as long as I'm there by 16:45. Sentence20: You're welcome, have a nice day. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User