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. 
 agent: Hello, how can I help you today? 
 customer: I am Steven Campbell, I am looking for a flight under fare of 500 to meet my mother at Orlando. 
 agent: Sure, kindly mention your travel dates? 
 customer: I will fly on 08/04 and return on 08/06. 
 agent: Can you please provide me your airport codes? 
 customer: I will fly from WA-SEA to FL-MCO. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: There is a flight with your requirement, airline is JetBlue with price 100 and a single connection. 
 customer: Please proceed with booking. 
 agent: Shall I proceed with booking? 
 customer: Sure. 
 agent: Your booking is done and flight number is 1001. 
 customer: Thank you for helping me. 
 agent: Thanks for reaching us, have a good day.

Output: book


Input: Consider Input: customer: Hi. 
 agent: Hello, how can I assist you? 
 customer: I am Benjamin Thompson, can you find a flight for me? I am planning for a trip from LAG to LAX. 
 agent: Ok, may I know your travelling details? 
 customer: My travelling dates are 08/29 and 08/31. Did you find any flight for me? 
 agent: Sorry, there is no flight available for you. 
 customer: That is fine. 
 agent: Thank you for reaching us. 
 customer: Thank you for your help.

Output: no_flight


Input: Consider Input: customer: Hi. I am Jonathan Davis. 
 agent: Hello, how can I amend you? 
 customer: Can you reserve me a flight ticket to Charlotte, CLT as I would like to visit The Billy Graham library? 
 agent: Sure. 
 customer: Thank you. 
 agent: Let me know your origin code. 
 customer: Origin code is Boston, BOS. 
 agent: How much you can afford for this journey? 
 customer: I can afford up to 500. 
 agent: Let me know your trip dates to check the flights. 
 customer: 02/12 and 02/14 are my depart and arrival dates. 
 agent: Please, wait. 
 customer: Ok. 
 agent: Thanks for waiting, there is flight with price 800. Shall I Proceed? 
 customer: No, do not proceed. 
 agent: Ok. 
 customer: Thank you for your response. 
 agent: Thank you for choosing us.
Output: no_reservation