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 guide you? 
 customer: My name is Dennis Davis. I want to travel from DFW to PHL, could you help me in booking the ticket? 
 agent: Yes, please provide the departure and arrival dates? 
 customer: It's from 09/21 to 09/23. 
 agent: I found a flight 1027 of Hawaiian airlines. Shall I book the ticket? 
 customer: Please book the ticket. 
 agent: Ok, your ticket is booked. 
 customer: Thank you for your time. 
 agent: Thank you, have a safe flight.
Example Output: book

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, How can I help you? 
 customer: Can you please help me in booking a flight ticket from PHX to SFO? 
 agent: Sure, May I know your travelling dates? 
 customer: I would like to fly on Aug 30 and return on Sept 01. 
 agent: Do you have any connection limit? 
 customer: I need a single connection. 
 agent: Are there any other preferences? 
 customer: I would like to prefer an economy class. 
 agent: May I know your name? 
 customer: Myself Jeffrey King. 
 agent: You have a connecting flight 1001 in AA airlines and price 100 in economy class, Shall I proceed? 
 customer: You can proceed to booking. 
 agent:  Your ticket has been processed and it will be send to your Email-Id shortly. 
 customer: Thank you. 
 agent: Thank you.
Example Output:
book