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

Ex Input:
customer: Hello, I am Ryan Anderson. 
 agent: Hello, how may I aid you at this moment? 
 customer: I would like to go to a beach in Washington, so could you please book a ticket for me? 
 agent: Can I have your journey dates? 
 customer: I would like to go on 02/03 and return back on 02/05. 
 agent: Please send your nearby airport codes. 
 customer: My airport codes are PHX and DCA. 
 agent: Please wait for a moment. 
 customer: Ok, ensure it is a single connecting flight. 
 agent: Sorry, no flights are running on those dates. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for reaching us. 
 customer: Welcome.

Ex Output:
no_flight


Ex Input:
customer: Hello, I am Rachel Wright. 
 agent: Hello, how can I be your helping hand? 
 customer: I want to change my existing reservation due to some health issues, can you please help me with that? 
 agent: Sure, I am here to help you. Please wait for a while, I will check your reservation. 
 customer: Sure. 
 agent: Thank you for being patience, there is no reservation found on your name. 
 customer: Ok, not an issue. Thank you for your information. 
 agent: Thank you for approaching us.

Ex Output:
no_reservation


Ex Input:
customer: Hi. 
 agent: Hello, how can I guide you today? 
 customer: Can you help me in changing my recent reservation? 
 agent: Sure, I will help you. May I know your good name please? 
 customer: My name is Andrew Lopez. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Thanks for your time, there is no active reservation found on your name. 
 customer: Ok, No issues. Thank you. 
 agent: Thank you.

Ex Output:
no_reservation