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 serve you? 
 customer: I am Jennifer Lopez, I want to cancel my ticket as my I want to visit New York is cancelled to my illness. Can you cancel the flight ticket which is on my name? 
 agent: Sure, please wait a while I will check and let you know. 
 customer: Sure. 
 agent: Thank you for waiting. Your reservation is found. 
 customer: Please cancel the reservation. 
 agent: Your reservation is cancelled. 
 customer: Thank you for the service. 
 agent: Thank you for reaching us.

Ex Output:
cancel


Ex Input:
customer: Hello, I am Deborah Clark. 
 agent: Hello, how can I help you today? 
 customer: I would like to travel from LGA to attend my business meeting. Could you please help me to book a ticket to SEA? 
 agent: Sure, please share your planned trip dates? 
 customer: My travelling dates will be on 07/12 to 07/14. 
 agent: Ok, any other requirements to be met? 
 customer: I need a connecting flight. 
 agent: Ok, please wait for a while. 
 customer: Ok. 
 agent: Thanks for waiting, we found a direct flight, shall I proceed? 
 customer: No, do not proceed. Thank you for your information. 
 agent: Ok, no issues. Thank you for reaching us.

Ex Output:
no_flight


Ex Input:
customer: Hi. My name is Deborah Lee. 
 agent: Hello, how may I help you? 
 customer: I want to change my recent reservation due to some health issue. 
 agent: Sure, please give me a moment, I will check the possibilities. 
 customer: Ok. 
 agent: Sorry Lee, there is no reservations on this name. 
 customer: It's ok. No problem. Thank you. 
 agent: Thanks for approaching us.

Ex Output:
no_reservation