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,. 
 agent: Hello. How may I guide you today? 
 customer: Can you please help me in cancelling my recent reservation, as my FIFA match got cancelled. 
 agent: Sure, I am gleeful to help you with that. May I know your name please? 
 customer: Myself, Lisa Mitchell. 
 agent: Please wait for a while, let me check your previous reservation status. 
 customer: Ok. 
 agent: Thank you for waiting. There is no reservation found on your name in our database to cancel it. 
 customer: Ok, no issues. Thank you for opting us. 
 agent: Thank you for reaching us, have a great day.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: Can you please reserve a flight ticket with the name of Paul Davis as I am planning to take my kids to centre for puppetry arts on 10/31? 
 agent: Sure, I am happy to help you. 
 customer: Thank you. 
 agent: May I know, from where you are planning to board? 
 customer: As my nearest airport is Houston, IAH, I want to board from here. 
 agent: When will you return to Houston? 
 customer: I would like to return on 11/02. 
 agent: Let me know your landing airport code to proceed further. 
 customer: Atlanta, ATL is my landing point. 
 agent: Thank you for sharing the details, wait for a while. 
 customer: Sure. 
 agent: Thanks for waiting. There is a connecting flight available with fare 200 in Southwest airline. Shall I proceed? 
 customer: No, do not proceed. I need a direct flight. 
 agent: Ok. 
 customer: Thank you for your information. 
 agent: Thank you for approaching us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I'm Barbara Collins. 
 agent: How can I help you? 
 customer: I want to attend a music event in Las Vegas. 
 agent: Ok. 
 customer: Can you book a ticket from CLT to LAS? I want to have 1 connecting flight. 
 agent: Please tell your travelling dates? 
 customer: I want to depart on 01/08 and return on 01/10. 
 agent: With your request the flight is available with 2 connection of flight. Are you ok with it? 
 customer: No, I would like to have 1 connection only. 
 agent: Sorry, there are no flights with your request. 
 customer: That's ok. Thank you for your help. 
 agent: Thank you and have a nice day.
Output: no_flight