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 can I help you today? 
 customer: Can you please help me in booking a flight ticket from SEA to ATL? 
 agent: Sure, On which dates would you like me to book a flight ticket for you? 
 customer: I would like to fly on July 16 and return on July 18. 
 agent: On what name, do I need to reserve your ticket? 
 customer: Myself Benjamin Davis. 
 agent: Let me know your connection limit? 
 customer: I need a single connection. 
 agent: Do you have any other requirements? 
 customer: No. 
 agent: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions. 
 customer: Not an issue. Thank you. 
 agent: Thank you for reaching us.
no_flight