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: Hi. 
 agent: Hello. How may I aid you for the day? 
 customer: Owing to an emergency I want cancel my reservation, can you help me? 
 agent: May I know your name please? 
 customer: Myself Linda Rodriguez. 
 agent: Ok, please wait a moment. Thank you for being waiting. There is no reservation found on your name. 
 customer: No problem, thanks for checking. 
 agent: Thank you for reaching us.
Example Output: no_reservation

Example Input: customer: Hello, I am Edward Williams. 
 agent: Hello Edward Williams. How can I aid you today? 
 customer: Can you please assist me in booking a flight ticket from NV-LAS to TX-AUS? 
 agent: Sure, when are you planning to travel? 
 customer: My journey dates are from 11/14 to 11/16. 
 agent: Do you need a halt? 
 customer: Yes, I need a halt in between journey. 
 agent: Thank you for your details, there are no flights found with the given details. 
 customer: That's ok, not a problem. Thanks for your information. 
 agent: Ok, thank you.
Example Output: no_flight

Example Input: customer: Hello. 
 agent: Hello\. How may I help you? 
 customer: Mark Phillips here. Can you please help me in booking the ticket from LGA to AUS? 
 agent: May I know your trip dates? 
 customer: My trip dates are 03/21 and 03/23. 
 agent: There is a direct flight with flight number 1018, can I proceed? 
 customer: Please search for a flight with 1 halt. 
 agent: I am sorry to inform you that there is no flight available with 1 connection. 
 customer: That's ok, thank you for giving the information. 
 agent: Thank you for contacting us.
Example Output:
no_flight