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. 
 agent: Hello. How can I assist you? 
 customer: I am Melissa Garcia. I want to book a flight ticket from MCO to PHX, can you please help me in flight booking? 
 agent: Sure, May I know your journey dates? 
 customer: I want to fly on Feb 02, return on Feb 04. 
 agent: Ok, do you have any preferences? 
 customer: Yes, my return time should be afternoon. 
 agent: Ok, let me check. 
 customer: Ok. 
 agent: Sorry, we couldn't found any flights. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for connecting us.

Ex Output:
no_flight


Ex Input:
customer: Hi. 
 agent: Hello, how may I help you? 
 customer: Can you help me to cancel my reservation? 
 agent: Sure, please share your good name? 
 customer: My name is Steven Brown. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, no reservation found on your given name. 
 customer: No issues, thank you for your time. 
 agent: Thank you for choosing us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Frank Lee, want to cancel my recent reservation due to some personal issue. Please help me out with that. 
 agent: Sure, I will help you. 
 customer: Thanks. 
 agent: Sorry, there is no reservation found under your name. 
 customer: It's ok, not an issue. Thank you for your help. 
 agent: Most welcome.

Ex Output:
no_reservation