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

customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: I am planning to attend a Snooker's competition in New York JFK from IAH. Can you find a flight ticket for me? 
 agent: Sure, I am glad to help you in booking. Can you please share your travel dates? 
 customer: Thank you. My planned trip dates are on May 05 and return on May 07. 
 agent: Ok, may I know your name? 
 customer: Ok, my name is Nancy Allen. 
 agent: Do you have any specification? 
 customer: Ok, I want a business class flight. 
 agent: Sorry, no flights are available on your preferable travel dates. 
 customer: Ok, not an issue. Thank you for your information. 
 agent: Thank you for reaching us, have a nice day.
no_flight

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.
no_flight

customer: Hi. 
 agent: Hello. How may I help you at this moment? 
 customer: I am Raymond Adams, can you find a flight on 10/25? 
 agent: Sure, I will find, may I know your airport codes? 
 customer: I am planning for a holiday trip with friends to DCA from LAX. 
 agent: Ok, when you are going to return to LAX? 
 customer: I will be return on 10/27. 
 agent: Ok, wait for a moment please to check availability of flights. 
 customer: Sure. 
 agent: Sorry to say this Adams, no flights as per your details. 
 customer: Not an issue. Thank you for your help. 
 agent: My pleasure, have a nice day.
no_flight