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. Frank Edwards here. 
 agent: Hello Frank, how may I aid you? 
 customer: Due to an emergency, I want to cancel my reservation. Can you please help me for that? 
 agent: Sure, wait a moment to check your previous reservation status. 
 customer: Ok. 
 agent: Sorry Frank, we don't found any reservation under your name. Would you like to ask us anything else? 
 customer: Nothing, thank you for the information. 
 agent: Ok, thank you for reaching us, have a nice day.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: I am Jack Moore. I want to cancel my reservation, due to my health issues. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: I found reservation with your name, shall I proceed to cancellation? 
 customer: Yes, you can proceed to cancellation. 
 agent: Your reservation has been cancelled successfully. 
 customer: Thanks for your good service. 
 agent: Thanks for choosing us.

Output: cancel


Input: Consider Input: customer: Hi, Andrew King here. 
 agent: Hello. How can I aid you today? 
 customer: I want to travel with my friends, can you please help me to book a ticket from DCA to DFW? 
 agent: Sure, I will help you Andrew King. Will you please inform your travel dates for booking flight ticket? 
 customer: Sure, my dates of planning is from 04/14 to 04/16. 
 agent: Ok, please wait a moment, I will check flight availability. 
 customer: Sure, please make sure that connection is 1. 
 agent: Sure. There is a flight ticket available as per your requested details, airline is Spirit and flight number is 1018. 
 customer: Please proceed with this booking. 
 agent: Ok. Your flight ticket is booked successfully. 
 customer: Thank you for your help in booking a ticket. 
 agent: Thank you for reaching us, have a good day Andrew King.
Output: book