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 may I help you? 
 customer: Can you aid me in booking a flight ticket from LAS to DCA? 
 agent: Sure, may I know your trip dates? 
 customer: I am planning to start on Feb 15th and return back on Feb 17th. 
 agent: Do you have any connection limits? 
 customer: Make sure that connection limit is 1. 
 agent: Ok, please wait a minute. 
 customer: I prefer to return back in evening time. 
 agent: Thank you for waiting. May I know your name please? 
 customer: Book the ticket on the name Amanda Evans. 
 agent: Sure, give me a minute. 
 customer: Take your time. 
 agent: Sorry Amanda, we regret to inform you that there is no flight available as per your request. 
 customer: No issues. Thank you for checking. 
 agent: Most welcome.
no_flight