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, I am Ryan Roberts. 
 agent: Hello, how can I assist you? 
 customer: I need to fly Austin for my brother's engagement, could you please help me in booking from JFK to AUS? 
 agent: Sure, when are you planning to travel? 
 customer: My journey is from 03/03 to 03/05. 
 agent: Please provide your specifications. 
 customer: I need a halt in mu journey. 
 agent: Unfortunately, there is no flights available based on your details. 
 customer: Ok, no worries. Thank you. 
 agent: Thank you.

Output: no_flight


Input: Consider Input: customer: Hi,. 
 agent: Hello, How may I help you? 
 customer: I want to book a flight ticket with the name Mark Walker. 
 agent: Sure, Please help me with your journey details? 
 customer: I have planned to travel from Las Vegas, NV- LAS to Oakland, CA- OAK . Also my depart date is on 30th June  and return date is on  2nd July. 
 agent: OK, Do you have any other specifications? 
 customer: I don't have a connection limit but I have a price limit of 1000 and Airline preference as normal-cost. 
 agent: OK, Please wait I will revert you back in a while. 
 customer: OK, Sure. 
 agent: May I know your name? 
 customer: I have already mentioned my name. 
 agent: Sorry for the inconvinience. Thank you for being patience. Sorry, They were no flights available as per your requirement. 
 customer: OK, Thank you for your service.

Output: no_flight


Input: Consider Input: customer: Hi. 
 agent: Hello. How may I guide you today? 
 customer: I am Carol Baker. I am looking for a direct flight from IAD to OAK, can you please help me to book my flight ticket? 
 agent: Sure, Can you please mention your preferable journey dates? 
 customer: Sure, I will depart on 09/12 and return on 09/14. 
 agent: Please wait for a minute. 
 customer: Ok, I will wait for your response. 
 agent: I am sorry to say that there is no flight found with that connection. 
 customer: Not an issue, I will find an other to reach my destination. Thank you for the information. 
 agent: Thank you for reaching us, have a great day.
Output: no_flight