Q: In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
customer: Hi. 
 agent: Hello, how can I assist you for the day? 
 customer: Can you please help me to book a flight from DEN to DTW? 
 agent: When you are willing to travel? 
 customer: My planned dates are on Dec 19th to 21st. 
 agent: May, I know your good name? 
 customer: Sure, Jennifer Hernandez is my name. 
 agent: Do you have any connection limit? 
 customer: I prefer a connected flight. 
 agent: We found 1021 AA airlines with single connection with price 300. 
 customer: Ok, you can proceed. 
 agent: Your, booking has been confirmed. 
 customer: Thank you. 
 agent: Thank you for reaching us.
A:
book