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: Thank you. I'm also looking for information on trains from cambridge to london kings cross. Sentence2: How about an expensive Mexican restaurant then? Sentence3: Okay, enjoy your trip! Have a great day. Sentence4: Ok, the booking was successful, the total fee is 94.4 GBP payable at the station . Reference number is : 4YTQP8ST . Can I help with anything else? Sentence5: When would you like to travel? Sentence6: Can I just get the phone number for now? Sentence7: I want to go all out this St Patricks day, can you find me an Irish restaurant? Lets go with an expensive one. Sentence8: yes please book for 5 people Sentence9: I need to leave after 09:00 on saturday Sentence10: No that is it. Thank you. Sentence11: Yes certainly, it is 01223400170. Sentence12: Sadly, there aren't any. Sentence13: TR2138 leaves exactly at 09:00 on Saturday. Would you like to book a ticket? Sentence14: Sure. There is Chiquito Restaurant Bar in the south. Would you like the address? Would you like me to book it for you? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System