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

[EX Q]: customer: Hi. 
 agent: Hello. How can I assist you at this moment? 
 customer: Please make a reservation with the name of Nicole Martin from PHX. 
 agent: Sure, I will assist you with that. Can you please mention your preferable travel dates? 
 customer: I want to travel on Dec 20 and return back on Dec 22. 
 agent: May I know your destination airport code name? 
 customer: Destination airport code is BOS. 
 agent: May I know your connection limit for this trip? 
 customer: I need a single connecting flight. 
 agent: Do you have any another specifications? 
 customer: I prefer to travel in economy class. 
 agent: Is there any additional preferences do you have? 
 customer: No. 
 agent: Ok, please hold on a moment. 
 customer: Sure. 
 agent: AA flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight? 
 customer: Yes, please confirm it. 
 agent: Your flight ticket is booked successfully, flight number is 1026. 
 customer: Thank you for the help. 
 agent: You are welcome Nicole Martin.
[EX A]: book

[EX Q]: customer: Hi. 
 agent: Hello. How may I guide you today? 
 customer: Can you find a flight for me from OAK to DFW? 
 agent: Sure, I am here to help you with that. Can you please share your planned travel dates? 
 customer: Ok, my journey dates are from June 05 to 07. 
 agent: May I know your name please? 
 customer: Sure, I am Stephen White. 
 agent: Do you have any class preference? 
 customer: No, I need a connecting flight. 
 agent: Would you like to travel in a connecting flight or in direct flight? 
 customer: I need a connecting flight as I said before. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Flight-1017 is available in Delta Airlines with single connection limit and the ticket price is 100. Shall I proceed with booking? 
 customer: Yes, please. 
 agent: Stephen White, your booking is done in economy class, the depart time and return time is  afternoon. 
 customer: Thank you. 
 agent: Most welcome, thank you for reaching us. Have a safe journey.
[EX A]: book

[EX Q]: customer: Hi, Shirley Thompson here. 
 agent: Hello, how may I aid you today? 
 customer: Owing to an emergency, my planned trip to New York with friends has been postponed. So I want you to change my existing reservation? 
 agent: Sure, I will help you. Please wait for a while. 
 customer: Sure. 
 agent: Sorry, there is no reservation found on your given name. 
 customer: Ok, no worries at all. 
 agent: Thanks for choosing us. 
 customer: Thank you for your service.
[EX A]:
no_reservation