You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I want to arrive by 11:15. Sentence2: Okay we have the de luca cucina and bar and the riverside brasserie. Which one would you like? Sentence3: Sure, what day do you want to travel? Sentence4: Do you have a preferred time frame ? Sentence5: Let's do the riverside brasserie. What about a table for 3 at 15:00 on Saturday? Sentence6: Great I also need a train that should depart cambridge and head to ely. Sentence7: TR3177 will arrive by 10:07 and leaves at 09:50 would you like me to book it for you? Sentence8: i will do modern european food Sentence9: I would like to leave on a Sunday. Sentence10: Can you check if there are any moderately priced restaurants in the centre of town? Sentence11: Yes, there are several. Do you prefer Asian or British food? Sentence12: No that is all. Thank you. Goodbye Sentence13: You are set, the total fee is 3.52 GBP payable at the station, your Reference number is WVJC995L . May I help with anything else? Sentence14: Ok. Thank you. Goodbye. Sentence15: Yes, please. Include the reference number please Sentence16: Booking was successful. The table will be reserved for 15 minutes. Reference number is : TYDEG9IJ . Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System