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: Hello. 
 agent: Hello, how may I aid you? 
 customer: Can you please help me in booking a flight ticket from ORD to DFW? 
 agent: Sure, please share your itinerary dates. 
 customer: I want to fly on July 08 and return on July 10. 
 agent: May I know your name? 
 customer: Myself Jacob Martin. 
 agent: Sorry Jacob Martin, no flights are available on your route. 
 customer: Not an issue. Thank you. 
 agent: Thank you for reaching us.
Output:
no_flight