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
Input: customer: Hi. Myself Jonathan Taylor. 
 agent: Hello, how may I support you today? 
 customer: I am planning for a trip with my family, can you help me with booking ticket from my departure in the afternoon time from JFK? 
 agent: Sure, please share me your destination airport code? 
 customer: Ok, my destination is LAX. 
 agent: May I know your planned journey dates? 
 customer: Fine, my planned dates are from Sept 17 to 19. 
 agent: Do you want any connection in between your flight journey? 
 customer: Yes, I need a connecting flight in a business class. 
 agent: Do you have any other preferences? 
 customer: No. 
 agent: Thank you for the details, sorry there is no flight found on your given journey data. 
 customer: It's ok, thanks for your information. 
 agent: Thank you for reaching us, we hope see you again.
Output:
no_flight