Detailed Instructions: 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
Q: customer: Hello. Myself Stephanie Hill. 
 agent: Hello, how can I aid you for the day? 
 customer: Could you please help me with booking a flight ticket from HOU to SFO? 
 agent: Sure, may I know your travel dates? 
 customer: My journey dates are from Oct 19 to Oct 21. 
 agent: Do you have any specifications? 
 customer: I need a halt in between my journey. 
 agent: Ok, please wait a moment. 
 customer: Sure, I will wait for your response. 
 agent: We found an airline Hawaiian with flight 1021 having a fare 200 with halt. 
 customer: Ok, please confirm the flight ticket booking. 
 agent: Your booking has been processed. 
 customer: Thank you for reaching us, have a safe journey.
A:
book