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: Hello, I am Gregory Carter. 
 agent: Hello, how can I assist you? 
 customer: I have planned visit Snoqualmie falls  at Seattle as it is a round trip. My preferred journey dates are from 01/11 to 01/13. Please help me with booking the ticket. 
 agent: Sure, I am here to help you. Can I have your airport codes? 
 customer: Sure, I want to fly from  WA- SEA . 
 agent: Ok, give me a moment. 
 customer: Ok. 
 agent: Thanks for waiting, I found a flight, which matches your criteria. Flight details are Hawaiian airline, flight number is 1018. There is a single connection with the price of 100. 
 customer: Sure, please proceed with booking. 
 agent: Your booking has confirmed, have a safe journey. 
 customer: Thank you for the reservation. 
 agent: Thanks for reaching us.
A:
book