Detailed 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
Problem:customer: Hello. 
 agent: Hello, how may I aid you today from my end? 
 customer: Stephen Hernandez here. I am looking a flight from BOS to SEA, can you help me? 
 agent: Sure, I am here to help you out. Please provide me your trip dates. 
 customer: My planning dates are 03/16 and 03/18. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Here is a flight with 2 stops and airfare is 100 in 1002 Spirit airlines, can I proceed with it? 
 customer: I need a direct flight. 
 agent: Let me check with your request. 
 customer: Ok, take your own time. 
 agent: Sorry Stephen, there is no direct flight with your travel dates in your route. 
 customer: It's ok, thank you for checking. 
 agent: Thank you for reaching us.
Solution:
no_flight