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 have three different choices depending on when you want to arrive. I've got one arriving by 24:23. Would that work? Sentence2: Sure! The postcode is cb11ln. Is there anything else I can help you with today? Sentence3: We have many options that meet your needs. Do you have a certain destination in mind? Sentence4: You might like Broughton House Gallery. Would you like more information about this? Sentence5: There are over 20 museums in the city, is there a particular part of town you'd like to be in? Sentence6: Yes please may I have their postcode? Sentence7: No I think that's all I need for now, thank you! Sentence8: Thank you. Can you tell me what kinds of museums there are in that area? Sentence9: You're welcome, have a wonderful visit! Sentence10: I am looking to go to cambridge and leave after 21:00 please. Sentence11: That would be great, I'd like to book for 1 person please. Sentence12: Your ticket has been booked, reference number is D77TJZNF Sentence13: No, I do not have any preference on area. What would you suggest? Sentence14: Can you help me get a train ticket leaving birmingham new street on sunday please? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System