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: Hi, I am Linda Carter. 
 agent: Hello, how may I assist you? 
 customer: As I am a new joiner, I need to attend two days training session in my branch office at Denver, DEN. Can you help me to book a halting flight? 
 agent: Sure, when would you like to travel? 
 customer: I want to fly on 12/12 and recur on 12/14. 
 agent: Help me with the source code? 
 customer: I want to board from Chicago, IL - ORD. 
 agent: THank you for your details, we found a flight in an airline Spirit of number 1010 with a price of 100. 
 customer: Please confirm the booking. 
 agent: Your flight ticket is booked. 
 customer: Thanks for your assistance. 
 agent: Thank you for reaching us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hi. How can I help you? 
 customer: Myself Stephen Parker. I want to travel from DEN to JFK, can you please book a flight ticket for me? 
 agent: Sure, may I know your date please? 
 customer: I want to travel from 06/10 to 06/12 dates. 
 agent: Hawaiian airlines is matching you with 1029 flight number, can I proceed for booking? 
 customer: Sure, please proceed it. 
 agent: Your booking is confirmed. 
 customer: Thank you so much. 
 agent: Thank you, have a safe journey.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I aid you? 
 customer: Due to an emergency, I want to change my reservation. Can you help me? 
 agent: Sure, we are here to help you. May I know your good name please? 
 customer: Deborah Campbell here. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: Sorry to inform that, there is no reservation found on your given name. 
 customer: No problem, Thanks for the information. 
 agent: Thanks for reaching us, have a nice day.
Output: no_reservation