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 help you at this moment? 
 customer: Owing to an emergency, I want to cancel my recent reservation. Can you help me out? 
 agent: Sure, I will help you with that. Can you please mention your name for further process? 
 customer: Barbara Jones. 
 agent: Ok, please hold on a moment. 
 customer: Ok, take your time. 
 agent: There is no previous reservation available under your name. 
 customer: That's ok. Anyways, thank you. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation


Ex Input:
customer: Hi. 
 agent: Hello. How may I guide you at this moment? 
 customer: I need to book a flight ticket from PHL to MCO, can you please help me for booking? 
 agent: Sure, may I know your travelling dates please? 
 customer: I would like to travel on 12/10 to return on 12/12. 
 agent: Ok, do you need any stopover in between the journey? 
 customer: I need a connecting flight. 
 agent: Do you prefer business or economy class? 
 customer: I need a business class. 
 agent: Can I have your good name please? 
 customer: Brenda Campbell here. 
 agent: There are no flights found on your requested dates. 
 customer: Ok, no problem. 
 agent: Thank you for reaching us. 
 customer: Thanks for your information.

Ex Output:
no_flight


Ex Input:
customer: Hello. 
 agent: Hello, how can I assist you today? 
 customer: I need to cancel my recent reservation owing to an emergency. 
 agent: Sure, let me know your name to check further in our records? 
 customer: My name is Raymond White. 
 agent: Please wait. 
 customer: Sure. 
 agent: Sorry, no reservation found with your name in our records to cancel it. 
 customer: Thank you. 
 agent: Thank you for contacting us.

Ex Output:
no_reservation