Q: 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. I am Jerry Hall. 
 agent: Hello Jerry Hall, how may I aid you? 
 customer: I planned to meet my cousin in SFO, can you please help me to book a flight ticket from SEA? 
 agent: Sure, please provide your itinerary dates. 
 customer: I prefer to travel on Jul 5 and Jul 7. 
 agent: Do you have any specifications? 
 customer: I would like to depart in evening in 1 connecting flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, no flights are available as per your specifications. 
 customer: Ok, no problem. Thank you for your time. 
 agent: Thank you for choosing us.
A:
no_flight