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. I am Barbara Jones. 
 agent: Hello, how may I support you today? 
 customer: I want to attend my sister engagement at Detroit, MI - DTW. Can you please book a connected flight? 
 agent: Sure, please share your dates. 
 customer: Sure, my travelling dates are 06/05 and 06/07. 
 agent: Ok, may I know your heading point? 
 customer: I have planned to start from Denver, CO - DEN. 
 agent: Ok, please be on hold. 
 customer: Sure. 
 agent: Thanks for being on hold, no flights were found based on your details. 
 customer: Ok, no issues. Thank you for your help. 
 agent: Thank you for choosing us.

Solution: no_flight