Given the task definition and input, reply with output. 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. 
 agent: Hello, how may I help you today? 
 customer: Can you please assist me with finding a flight on the route from BOS to DTW? 
 agent: Sure, could you please share me with your dates of journey? 
 customer: My journey dates are from Feb 15 to Feb 17. 
 agent: May I know your name please? 
 customer: Myself Ronald Williams. 
 agent: Are you looking for any other help from my side? 
 customer: I need a direct flight. 
 agent: Please wait for a mean while. 
 customer: Sure. 
 agent: I found a direct flight of fare 700 with the Southwest airline, shall I proceed with this ticket booking? 
 customer: Please book it. 
 agent: Ok, I have reserved your ticket with the flight number 1011, your depart time is at 5:00 hours and return will be at 17:00 hours. 
 customer: Thank you for helping me with booking. 
 agent: You are welcome, have a safe journey. 
 customer: Thank you.
book