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

Input: Consider Input: customer: Hi. 
 agent: Hello,. How can I be at your service? 
 customer: I am Anthony Miller and help me to cancel the reservation, as my visa got rejected to go for a holidays vacation. 
 agent: Sure, we are here to assist you. 
 customer: Ok. 
 agent: Please be on hold for a second. 
 customer: Sure. 
 agent: Thanks for holding on, we found a reservation in your name and that has been cancelled successfully. 
 customer: Thank you. 
 agent: Thanks for approaching us, your amount will be credited to your account.

Output: cancel


Input: Consider Input: customer: Hi, Jason hill here. 
 agent: Hello. 
 customer: I need to book a flight ticket to New York to enjoy music festivals with family. 
 agent: How can I help you? Can you please share your dates of travelling? 
 customer: My travel dates are 05/21 and 05/23. 
 agent: May I know price limit? 
 customer: I need a direct  flight within range of 1000. 
 agent: Can I have your airport codes? 
 customer: I will depart from CA-OAK to NY-LGA. 
 agent: Please wait. 
 customer: Ok. 
 agent: Thanks for your time, sorry, no flights found on that day. 
 customer: Ok, thank you. 
 agent: Thank you for picking us.

Output: no_flight


Input: Consider Input: customer: Hi. 
 agent: Hello. How may I aid you? 
 customer: I need to cancel my recent reservation owing to an emergency. 
 agent: May I know your name? 
 customer: My name is Gregory Moore. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: I found your reservation and I have cancelled it. 
 customer: Thanks. 
 agent: Thanks for reaching us.
Output: cancel