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
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.
Example solution: no_reservation
Example 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

Problem: customer: Hello. 
 agent: Hello, how can I help you? 
 customer: I am planning to travel from DEN to AUS, can you please help me to book a flight ticket? 
 agent: Sure, please share your travelling dates. 
 customer: Sure, my travelling dates are Dec 24 and Dec 26. 
 agent: Do you need any connection in between the journey? 
 customer: I need a connecting flight. 
 agent: Do you have any other preferences? 
 customer: My class preference is economy. 
 agent: Ok, may I know your name please? 
 customer: My name is Cynthia Taylor. 
 agent: Ok, please stand by. 
 customer: Sure, I will wait for your response. 
 agent: Thank you for waiting, sorry no flights found with your details. 
 customer: No problem, thank you for your information. 
 agent: Thank you for reaching us, have a good day.
Solution: no_flight