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 best can I serve you today? 
 customer: I would like to change my reservation due to some health issues, can you please help me out with that? 
 agent: Sure, I am here to help you with that. 
 customer: Thank you. 
 agent: For changing your reservation, we need to know your name to check your reservation status. So, please forward me your name. 
 customer: Jacob Smith here. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Sorry to inform you that, we have not found any active reservation on your name in our records. 
 customer: That's ok, no problem. Anyway thank you for checking out. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello,. How can I amend you today? 
 customer: I am Jason Young. I want to book a ticket to meet my old friends, can you please help me that? 
 agent: Sure, we are here to aid you. 
 customer: Thank you. 
 agent: Where you want to go? 
 customer: I want to go from Charlotte, CLT to New York, JFK. 
 agent: Kindly assign your preferred dates of travelling? 
 customer: I would like to leave between 05/24 and 05/26. 
 agent: Thanks for your details. Based on your request we found a plane 1002 of Southwest airline with a connecting flight. Shall I proceed? 
 customer: Yes, please book this ticket. 
 agent: Reservation is done. 
 customer: Thank you so much. 
 agent: Thank you for availing us.

Ex Output:
book


Ex Input:
customer: Hello, myself Justin Gonzalez. 
 agent: Hello Justin, how can I assist you? 
 customer: I would like to visit Chicago to meet my brother, could you please help me in booking a ticket from ATL to ORD? 
 agent: Sure, may I know your preferred journey dates? 
 customer: My planned journey dates are 12/16 and 12/18. 
 agent: Please wait for a minute. 
 customer: Sure, take your time. 
 agent: There are no flights available at this moment. 
 customer: Ok, no problem. Thank you for your information. 
 agent: Thank you for utilising our services.

Ex Output:
no_flight