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 Q]: customer: Hi. Sharon Brown here...... 
 agent: Hello, do you need any help from us? 
 customer: Please help me out in booking the ticket from IAD to PHL. 
 agent: Sure, could you please share your departure and arrival day? 
 customer: My trip dates will be May 16 to May 18. 
 agent: The economy class with flight number 1018 of Frontier airline is available having fare as 100 and connection as 0, is it ok for you? 
 customer: Can you please tell me return time? 
 agent: Ok, the return time is in morning. 
 customer: Please proceed. 
 agent: Ok, your reservation is confirmed. 
 customer: Thank you. 
 agent: You are welcome, have a great day.
[EX A]: book

[EX Q]: 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.
[EX A]: cancel

[EX Q]: customer: Hi. 
 agent: Hello, how can I aid you? 
 customer: Could you please change my existing reservation due to postpone of my exams? 
 agent: Sure, may I know your name to proceed further? 
 customer: My name is Donna Adams. 
 agent: We regret to inform you that there is no active reservation found on your name to change. 
 customer: Not a problem, thank you. 
 agent: Thank you for contacting us.
[EX A]:
no_reservation