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 Input: customer: Hello. 
 agent: Hello, how can I help you? 
 customer: I want to travel from EWR to AUS. My travelling dates are from 07/14 to 07/16. 
 agent: Ok, please wait for a moment. 
 customer: Make sure that there is 1 connection. 
 agent: Sorry, there are no flights available regarding your journey. 
 customer: That's ok. 
 agent: Do you want any other information please? Ok. Thank you and have a nice day. May I know your name please? 
 customer: Gary Allen here. Thank you for your support.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello, how may I help you? 
 customer: Unfortunately I have an emergency meeting so I want to cancel my reservation, can you please help in cancelling my reservation? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: May I know your good name please ? 
 customer: I am Emma Young. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: Sorry, there is no reservation found on your given name. 
 customer: Ok, no problem. Thank you for your quick response. 
 agent: Thanks for choosing us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: Can you please help me in booking a flight ticket from ORD to DFW? 
 agent: Sure, please share your itinerary dates. 
 customer: I want to fly on July 08 and return on July 10. 
 agent: May I know your name? 
 customer: Myself Jacob Martin. 
 agent: Sorry Jacob Martin, no flights are available on your route. 
 customer: Not an issue. Thank you. 
 agent: Thank you for reaching us.
Example Output:
no_flight