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

Example Input: customer: Hello. 
 agent: Hello. 
 customer: I am Stephanie Campbell. 
 agent: How may I guide you today? 
 customer: My business meeting has been cancelled, could you please help me with cancelling my recent reservation? 
 agent: Sure, I will help you with that. Please wait for a minute. 
 customer: Sure, take your time. 
 agent: I am sorry to say that there is no reservation found. 
 customer: That's ok, not an issue. Anyways, thank you for the information. 
 agent: Thank you for reaching us.
Example Output: no_reservation

Example Input: 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.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello. 
 customer: Eric Taylor here. 
 agent: Eric Taylor, how may I assist you with today? 
 customer: Can you book a connecting flight to Los Angeles for my family vacation? 
 agent: Sure, I will assist you with the booking process. May I know with your planned travel dates please? 
 customer: Yes, my travel dates for the journey are from Nov 29 to Dec 01. My airport codes for the journey are from EWR to LAX. 
 agent: Thank you for the details. 
 customer: Ok. 
 agent: Please allow me a minute. 
 customer: Sure. 
 agent: Thank you for your time. I regret to say that there are no flight available in your preferred route of journey. 
 customer: Ok, that is not a problem. 
 agent: Thank you understanding. 
 customer: Thank you. 
 agent: Thank you for reaching us. Have a great day.
Example Output:
no_flight