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: How about a chinese restaurant? Sentence2: I'm so sorry, but I wasn't able to make that reservation for you. May I try on another day or at another time? Sentence3: I was able to get you that reservation on Wednesday. The table will be reserved for 15 minutes prior to your arrival. Sentence4: You as well. Thanks for calling. Goodbye. Sentence5: No, I don't need that anymore. Thanks. Have a great day! Sentence6: Absolutely, the reference number is W92C2Z47 . Is there anything else I can help you with today? Sentence7: The hotpot sounds like a good idea. Need a reservation? Sentence8: May I have the reference number please? Sentence9: Yes, let's shoot for the same thing but on Wednesday instead, okay? Sentence10: i want a place for dinner and serves a mexican food,where can i find it?please first pick for me a taxi to that place should be to the north. Sentence11: Yes, please. 6 people at 11:30 on sunday. Sentence12: That was all. Thanks Sentence13: Did you say you also needed a taxi to the restaurant? Sentence14: Unfortunately, I was unable to find a Mexican restaurant in the north. Is there anything else I can help you with? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User