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 help you? 
 customer: I am Edward Baker. I am planning to visit a Chicago from AUS to ORD. Can you find a flight ticket for me? 
 agent: Sure, I am happy to help you. Can I know your travelling dates? 
 customer: Ok, my itinerary dates are on 10/05 and 10/07. 
 agent: Ok, I will search the flight and then I will get back to you. 
 customer: Ok, make sure that the connection limit 0. 
 agent: Sorry to inform you, there is no flight available with the connection limit 0 in this route. 
 customer: It's ok, thank you for searching. 
 agent: You are welcome. Thank you for reaching us.
Solution:
no_flight