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 today? 
 customer: I have planned to travel from Houston, TX- IAH to Atlanta, GA- ATL. 
 agent: Sure, please provide me your journey dates? 
 customer: Sure, my travelling dates are from depart day on 11th Nov and return on 13th Nov. 
 agent: OK, please wait I will revert you in a while. 
 customer: OK, sure. 
 agent: Thank you for your patience. Sorry, there were no flights available on the specified  dates you mentioned. May I know your good name? 
 customer: OK, no issues. Thank you the information. I am Mary Jackson. 
 agent: OK, thank you for contacting us, have a good day.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello. How may I help you? 
 customer: I want to change my reservation due to health problem, can you help me? 
 agent: Yes, I am here to help you. Let me know your name please. 
 customer: Myself George Edwards. 
 agent: Edwards, please wait for a while. I will check your reservation status and get back to you. 
 customer: Ok. 
 agent: Edwards, I have not found any reservation by your name in our database. 
 customer: No problem, thanks for checking. 
 agent: You are most welcome and thank you for contacting us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer:  I am David King want to travel to NY-EWR to meet my cousins from MI-DTW. Can you book a ticket? 
 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: Can you share me your travelling dates to book a flight ticket? 
 customer: I will depart on 07/21 and return on 07/23. 
 agent: Do you need any halt in between your journey? 
 customer: I need a connecting flight. 
 agent: Ok, wait for some time I will check the availability of flights on your details and get back to you. We found Jetblue airline with connecting flight and number 1005 fare of 100. 
 customer: Ok, you can proceed. 
 agent: Your ticket has been confirmed. 
 customer: Thank you for booking. 
 agent: Thanks for approaching us.
Example Output:
book