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
One example: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Solution is here: no_reservation
Explanation: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

Now, solve this: customer: Hello, Eric Anderson is my name. 
 agent: Hello, how may I oblige you today? 
 customer: I want to attend Film festival which is going to be held at Washington, DC - IAD. 
 agent: Ok. 
 customer: Can you please book a ticket on 06/03? 
 agent: Sure, I am here to assist you. I need your selected airport code, that you wish to board from? 
 customer: Sure, I want to start from Dallas & Fort Worth, TX - DFW. 
 agent: When will you catch your return flight? 
 customer: I intend to return on 06/05. 
 agent: Do you prefer any halt in between your journey? 
 customer: Yes, I need a halt. 
 agent:  Ok, please wait a moment, let me search a flight for you. 
 customer: Sure. 
 agent:  Thanks for your precious time. We found Jet Blue airline fare of 100. Shall I proceed for booking with single stopover flight? 
 customer: Ok, please proceed for booking. 
 agent: Your ticket has been confirmed with airline number 1014. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Solution:
book