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 can I help you? 
 customer: I am Elizabeth Gonzalez. I am looking for a direct flight from IAH to DTW, please book my flight ticket. 
 agent: May I know your desired travel dates please? 
 customer: Sure, I want to depart on Dec 4th and I have to return back in the afternoon on Dec 6th. 
 agent: Please wait a while. 
 customer: Sure. 
 agent: There is a flight with connection limit 1 and fare 200, shall I proceed for booking? 
 customer: No, I prefer for a direct flight. 
 agent: Sorry to say, there is no flight available on your desired travel dates. 
 customer: Sad to hear that, thank you for checking. 
 agent: Thank you for opting us.
Example Output: no_flight

Example Input: customer: Hello. 
 agent: Hello. 
 customer: Myself Scott Collins. 
 agent: How can I help you? 
 customer: I just want to change my existing reservation Because my seminar was postponed can you help me for that? 
 agent: Unfortunately there is no reservation found under your name. 
 customer: Ok, that's fine. 
 agent: Thank you for reaching us. 
 customer: Thank you for your services. 
 agent: Have a great day.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello. 
 customer: Myself Thomas Thompson,. 
 agent: How can I assist you? 
 customer: I am planninfg to meet my b.tech friends at New York this weekend. Can you please help me in reserving the ticket from LAX to JFK? 
 agent: Sure, I can help you with that. May I know your preferable travel dates please? 
 customer: I am willing to drop-off Oct 14 and again I will retrieve on Oct 16. 
 agent: Ok, please wait for a while. 
 customer: Sure. 
 agent: Sorry to inform you that there are no flights available for you on those dates. 
 customer: Not a big issue, I will choose an other way to reach my destination. Thank you very much for your service. 
 agent: Thank you for reaching us. 
 customer: You are welcome.
Example Output:
no_flight