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

Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I am Stephanie Campbell. 
 agent: How may I guide you today? 
 customer: My business meeting has been cancelled, could you please help me with cancelling my recent reservation? 
 agent: Sure, I will help you with that. Please wait for a minute. 
 customer: Sure, take your time. 
 agent: I am sorry to say that there is no reservation found. 
 customer: That's ok, not an issue. Anyways, thank you for the information. 
 agent: Thank you for reaching us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: I am Eric Baker want to present my documentation in National Conference at NY-EWR. Can you book a ticket from TX-HOU? 
 agent: Sure, we are perky to serve you. May I know your trip dates? 
 customer: My trip dates are 02/10 and 02/12. 
 agent: Sorry to inform you that, no flights are available based on your requirements. 
 customer: Ok, no issues. Thank you for your help. 
 agent: Thank you for choosing us.

Output: no_flight


Input: Consider Input: customer: Hello,. 
 agent: Hello, how can I support you? 
 customer: I want to book a connecting flight ticket as I have planned to go for a Hummer Tour. Please help me out. 
 agent: Sure. Let me know your scheduled dates of journey. 
 customer: My travelling dates are from 01/30 to 02/01. 
 agent: Could you please provide your boarding and landing airport codes? 
 customer: My source code is TX- DFW and Destination code is NV- LAS. 
 agent: Please wait for a while, I will check the availability of flights and revert you. 
 customer: Ok. 
 agent: Thank you for your patience. Unfortunately there are no flights available with your requirements. 
 customer: Ok, no issues. Thank you. 
 agent: Let me know your good name please. 
 customer: I am Kimberly Phillips. 
 agent: Thank you for reaching us.
Output: no_flight