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. 
 agent: Hello, how may I aid you for the day? 
 customer: As my scheduled holiday trip got cancelled, I need your help in cancelling my reservation. 
 agent: Sure, I am here to help you. May I know your name to cancel the reservation? 
 customer: I am Paul Mitchell. 
 agent: Ok, I will check the recent reservation on your name and get back to you. 
 customer: Ok. 
 agent: There is no reservation found on your name to cancel. 
 customer: Ok, thanks for the information. 
 agent: Thank you for contacting us. Have a great day.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I need to cancel my recent reservation, as my planned trip with my friends got cancelled. Can you please help me out? 
 agent: Ok, please mention your name to check your reservation status. 
 customer: Sure, myself Stephanie Carter. 
 agent: Thanks for your response, there is no reservation found under your name to cancel it. 
 customer: Not a big problem, anyway thank you for the information. 
 agent: Welcome Stephanie Carter. 
 customer: Thank you for searching.

Output: no_reservation


Input: Consider Input: customer: Hello, I am Kimberly Hall. 
 agent: Hello. How can I help you? 
 customer: I would like to travel from HOU to EWR. can you please help me to book a ticket? 
 agent: Help me with your boarding and landing dates? 
 customer: My travelling dates will be on 03/04 to 03/06. 
 agent: Do you have any preferences? 
 customer: I need  a connecting flight. 
 agent: We found a connecting flight Southwest with flight number 1013 and price is 600. 
 customer: You can proceed to booking. 
 agent: Your booking is confirmed. 
 customer: Thank you. 
 agent:  Thanks for opting us.
Output: book