You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
One example: 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
Solution is here: Answer: (A) User
Explanation: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

Now, solve this: 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
Solution:
Answer: (B) System